New Technique for Deposition of Textured YBCO Thin Films for Conductor Development
Organization: University of Cincinnati
To improve the transport properties of high-temperature superconductors, extensive experimental investigations have been carried out in developing highly-textured thin films on a variety of superconducting substrates. Yba2Cu3Ox (“YBCO”) films are useful in this context, and have been extensively studied in recent years. One promising technique for the fabrication of these materials for large-scale operations is the technique of epitaxial deposition on rolling assisted biaxially textured substrates (RABiTS). Recent work has reported ...
Rigid Endoscopic Probe For Non-Linear Optical Microscopic (NLOM) Imaging
Organization: University of California, Irvine (UC Irvine)
Low Loss Planar Waveguide for Use in Photonic Integrated Circuits
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel low loss planar waveguide structure for use in photonic integrated circuits (PICs). This waveguide accomplishes low loss even at sharp bend angles, and it is less susceptible to environmental influences such as vibrations than current technology. Initial prototypes have exhibited
Inherent Antennas for RFID on Printed Circuit Boards
Organization: University of Pittsburgh
Neutron Detectors Made Of Inorganic Materials
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UC Santa Barbara have developed a method for fabricating neutron detectors having an active layer comprised of inorganic materials such as semiconductors or small particles. These materials function as a semiconductor host matrix that transports carriers excited by neutron absorption. These composite materials can be fabricated using fabrication approaches similar to the ones currently used for the fabrication of efficient solar cells.
Novel Electrocoagulation/Electroflotation System for Clarifying Water
Organization: University of California, Merced (UC Merced)
University of California, Merced (UCM) researchers have invented an electrode-based system for generating ions that promote clumping of suspended solids (electrocoagulation) and for generating bubbles for concentrating these clumps (electroflotation). The electrode geometry and materials used in this invention enables both electrocoagultation and electroflotation to occur in the same containment vessel. The use of electricity and electrodes in the UCM system means that it employs no chemical coagulants nor highly mechanized processes for ...
Polymer for reversible photoinduced sol gel transitions
Organization: University of Pittsburgh
Surface-Active Antifungal Polyquaternary Amine
Organization: University of Pittsburgh
A Fully Automated Centrifugal-Based Fluidic System For Processing Microarrays On Cd
Organization: University of California, Irvine (UC Irvine)
High-Performance Group-III Nitride Optoelectronic Devices via Improved Waveguide Design
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a design for semipolar/nonpolar nitride-based optoelectronic devices that utilizes stress relaxation at heterointerfaces, allowing for an entirely new approach to achieving high performance optoelectronic devices with highly strained active regions. This approach reduces the constraint on misfit dislocation formation at the heterointerfaces, leading to high-performance devices through significantly increased freedom in the waveguide design. Areas of improved performance ...
High Efficiency Near-Ultraviolet and Ultraviolet Light Emitters
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a growth method and composition for high efficiency nitride-based near-ultraviolet (NUV) and ultraviolet (UV) light emitters utilizing an AlInN layer as a replacement for InGaN active layer. In addition to increased efficiency, this method/composition may also increase output power and decrease production costs for these devices.
Method for Deposition of InGaN Layers with High Indium Content
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method for depositing InGaN layers with high indium content. It involves depositing at least one quantum well layer at a pressure greater than one atmosphere. The wells may comprise of multiple layers having varying or graded compositions, or one or more layers of dissimilar (Al,Ga,In,B)N composition which contain some indium and may also be doped. All of these growth options allow for much flexibility in implementation. With the higher indium content that this ...
Surfactant Based Tobramycin Solution for Inhalation
Organization: University of Pittsburgh
Electrical Pumping Scheme for Vertical-Cavity Surface-Emitting Lasers
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed an electrical pumping scheme for VCSELs. This design results in improved device efficiency, improved output power, even current distribution, and preferential support of single mode operation. VCSELs are particularly useful in fiber-optic communication systems.
Controlling the Surface Morphology of III-Nitride Thin Films on Semipolar Substrates
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method for controlling the surface morphology of III-nitride thin films on semipolar substrates. Improved surface morphology can lead to a number of advantages for semipolar nitride device manufacturers, including, better uniformity in the thickness, composition, doping, electrical properties, and luminescence characteristics of individual layers in a given device. Therefore, this novel method enables the realization of the benefits of semipolar nitride LEDs ...
Highly Durable Thermal Barrier Coatings for Use in Turbine Engines
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel thermal barrier coating composition that promises to both improve fuel efficiencies and decrease emissions in turbine engines. These advantages are accomplished by both raising the temperature capability of the barrier oxides and increasing their durability, while retaining desirable mechanical attributes of the current material. These thermal barrier coatings are applicable in turbine engines used for both propulsion, such as jet engines, and power generation, ...
Self-Healing Matrices for High Temperature Turbine Engine Composites
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel matrix concept for silicon carbide (SiC)-based ceramic matrix composites that has the ability to self heal under high temperature conditions. It accomplishes this by forming a stable, protective water vapor barrier in-situ when exposed to a high temperature oxidizing environment. When used in combination with an outer environmental barrier coating (EBC), the matrix concept provides robustness in case of cracking or local loss of the EBC, allowing the surface to ...
Organization: University of California, Santa Barbara (UC Santa Barbara)
UC Santa Barbara has developed a suite of patent applications related to the diverse applications of Titanium MEMS, including: UC Case No. 2003-360: 'Titanium MEMS in Harsh Environments.' Foundational patent, covering MEMs devices of titanium and other suitable metals, as well as the method of fabricating those devices. The process described uses the existing silicon infrastructure and allows design considerations currently in use for the SCREAM process to be applied to the metal MEMs process. Process applications include, ...
Organization: University of California, Santa Barbara (UC Santa Barbara)
Three-Dimensional Metal Microfabrication Process And Devices Produced Thereby
Organization: University of California, Santa Barbara (UC Santa Barbara)
Light Emitting Device with Stair Quantum Well
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a stair quantum well design for light emitting devices. A thin quantum well that steps up is substituted for a conventionally designed thick well, which results in an increase in reliability due to the strain relief. In addition, due to reduced quantum confinement, longer wavelength emissions are possible for a given indium composition primary well, resulting in easier production of green light emitting devices. The stair quantum well design also exhibits improved ...
Chemical Sensor Utilizing a Chemically Sensitive Electrode in Combination with Thin Diamond Layers
Organization: Vanderbilt University
A solid state chemical sensing device is described in which a chemically sensitive electrode, and at least one diamond film are deposited on a conductive or insulating substrate. The device forms a sensing structure in which conduction of current through the device in the presence of a target chemical is dominated by space charged limited current, thereby providing enhanced sensitivity and selectivity.WebsiteU.S. Patent 5,656,827: Chemical sensor utilizing a chemically sensitive electrode in combination with thin diamond layers
Motion Generator to Transform Linear into Nutation Motion
Organization: Vanderbilt University
A nutation motion generator which transforms linear motion into nutation motion. The device employs a spherical, four-bar linkage mechanism. Three four-bar linkage mechanisms are sandwiched between a stationary support surface and a drive plate and arranged at 120-degree intervals about the support surface. Each four-bar linkage mechanism is constructed of four planar sections which are hinged along their edges, the four hinged planar sections being essentially triangular in shape so that they would join at a point in the center of the device ...
Organization: Vanderbilt University
Summary Vanderbilt researchers have developed a device that allows for a more accurate and precise detection of brain tumor borders in real time. This allows neurosurgeons to remove all tumor tissue without removing critical normal tissue in surgical brain resections. Description Surgical removal of brain tumor is the most common initial treatment and is typically followed by radiation therapy and chemotherapy. Surgery aims to remove the maximum amount of the tumor mass without sacrificing the patients’ neurological function. Aggressive ...
Method for Determining Bone Surface Points Using A-Mode Ultrasound
Organization: Vanderbilt University
An A-mode ultrasound transducer is tracked in three-dimensions by an optical position tracking system as the transducer is scanned over the skin to generate measurements of bone surface distance from the transducer. A processor correlates the ultrasound data with position and orientation data to generate a three-dimensional physical space model of the bone surface which is registered with an image space model of the bone surface generated from a tomographic image to produce an alignment of the two models. The ultrasound transducer is ...
Organization: Vanderbilt University
This application describes the design of the split-tube flexure, a unique precision revolute joint that exhibits a considerably larger range of motion and significantly better multi-axis revolute joint characteristics than a conventional flexure. The development of this joint enables the implementation of spatially-loaded revolute joint-based precision machines with well-behaved kinematic and dynamic characteristics and without the backlash and stick-slip behavior that would otherwise prevent precision machine control.WebsiteU.S. ...
Diamond Triode Devices with a Diamond Microtip Emitter
Organization: Vanderbilt University
Summary This technology is a diamond triode for micro and power electronics. Diamond microtip field emitters are used in triode vacuum electronic devices, sensors and displays. Diamond triode devices having integral anode and grid structures are fabricated using a patented process. Ultra-sharp tips are formed on the emitters in the fabrication process in which diamond is deposited into mold cavities in a two-step deposition sequence. During deposition of the diamond, the carbon graphite content is carefully controlled to enhance ...
System and Method for Measuring of Lung Vascular Injury by Ultrasonic Velocity and Blood Impedance
Organization: Vanderbilt University
The present invention is a method for assessing capillary permeability to determine vascular lung injury without requiring the injection of radioactive material or requiring the sampling of blood. The method includes measuring impedance and ultrasonic velocity of blood flow through a lung. A hypertonic bolus is injected into the blood flow, and measurements of the blood flow are taken to determine the ultrasonic velocity and the electrical impedance of the blood. These measurements are used to calculate the capillary transport ...
Conducting Polymers for Surface Engineering in Biotechnology
Organization: Israel Tech Transfer Organization
Description of Technology This invention concerns novel conducting functional polymers and resulting copolymers that present a major interest for biotechnology applications such as miniaturized microarrays, biosensors with or without electrochemical read-out, and super paramagnetic nanocomposites for diagnostics and genetic testing. Composite surfaces can be tailored regarding their specific properties to optimize (i) the covalent grafting of diagnostic molecular probes (enzymes, antibodies, DNA/RNA sequences, oligosaccharides), and/or (ii) ...
Hybrid Silicon Evanescent Devices
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara, have developed a novel method to selectively create a buried SiO2 layer and subsequent SOI waveguide structure on bare silicon wafers, using the well-developed SIMOX process that is widely used to manufacture commercial SOI wafers. The SOI structure is selectively formed while implementing the same waveguiding function in the SOI region. And, unlike conventional SOI structures, the thermal resistance is dramatically reduced since top Si device layer and Si substrate are not ...
Microvascular Carbon Capture Device
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
Energy is a large expenditure for all consumers and corporations. Buildings are typically subjected to excess heat loads from the infrared region of incident sunlight. By coating windows and rooftops with infrared reflective coatings, unwanted heating is minimized, which greatly reduces energy costs. However, most commercially available infrared coatings rely on expensive or toxic compounds, so they have not found widespread use beyond basic rooftop applications. For example, in the case of windows, heat reflecting solutions are often ...
Novel Surveillance Camera Network
Organization: University of California, Riverside (UCR)
Camera networks are used in many applications to track targets over a large area (e.g. surveillance and security, environmental monitoring, disaster response). However, the usefulness of the network is almost completely dependent on the personnel watching and analyzing the data. Moreover, most existing camera networks try to cover the entire area being analyzed with a set of passive cameras. This set-up severely limits the ability of the cameras to selectively acquire high resolution shots. For efficiency and maximum resource ...
Localized Silicon-On-Insulator (SOI) Wafer
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a new and simple way to realize silicon-on-insulator (SOI) wafers with localized insulator region. The fabrication is implemented by well-known CMOS technology and completely compatible to current SOI wafer manufacturing flow.
A Cloud Speed Sensor for PV Generators and Utility Operators
Organization: University of California, San Diego (UC San Diego)
Novel Route to Manufacturing Filled Metals, Ceramics, or Polymers
Organization: University of Cincinnati
Manufacturing techniques for composite “filled” materials (metal, pure or alloy; ceramic or polymer, single or co-polymer, formulated or pure) are useful. Techniques have been sought by which these materials may be produced in such a fashion as to include significant volumes of two fine, uniformly dispersed phase in a composite material, as, for example, ceramics toughened (i.e. made less brittle) by the incorporation of carbon; metals strengthened by the incorporation of ceramic fillers; and polymers filled in situ with pigments. We have ...
Synthesis of Silica Nano and Microstructures Under Economical Conditions
Organization: University of Cincinnati
The synthesis and characterization of nanometer and micrometer-scale silicon structures is currently of great interest. Such materials have tremendous potential application in the fields of optroelectronics, nano-composites, ceramics, rubber technology, and biomedical materials, in addition to displaying great promise in applications involving catalysis and chemical separations. Traditional techniques for the synthesis of these structures involve extremes of pH and high temperature, along with associated long preparation and reaction times, ...
High-Performance Biodegradable Films
Organization: University of Cincinnati
We have developed a process for transforming starch into biodegradable films. The starch is chemically modified and crosslinked. Under ordinary conditions, the resulting films would be weak and brittle. However, with further processing we have obtained tough films that are hydrophobic and resistant to breakdown during fabrication and normal use, yet susceptible to biodegradation after disposal. We have obtained films with tensile strengths of 15 - 47 MPa, tensile moduli from 320 - 670 MPa, and elongations at break from 5-120%, depending on ...
Novel Mercury (and other metal) Vapor Sorbents
Organization: University of Cincinnati
Dr. Neville Pinto and his laboratory have developed a material to remove metal vapors from gas streams, particularly mercury. Coal-fired power plants are the largest single man-made source of mercury pollution in the U.S. (approximately 48 tons of mercury annually, or about one-third of the total US anthropogenic mercury emissions). Mercury from coal-fired power plants is released into the air through the exhaust system when coal is burned. The primary exposure occurs when this mercury falls to the earth and runs into lakes, rivers, and ...
Energy Aware Multi-path Routing for Uniform Power Consumption in Sensor networks
Organization: University of Cincinnati
In a sensor network where every node has a limited energy supply, one of the primary concerns is to maximize the network lifetime through energy-efficient routing. The method of the present invention includes a deterministic traffic scheduling algorithm that balances the load over multiple paths between source and destination, in proportion to their residual energy. This protocol focuses on uniformly utilizing the resources of the network, rather than on optimality of routes. Most existing sensor network routing protocols optimize for single ...
Controlled Mixing and Penetration in a Swirling Jet Injector
Organization: University of Cincinnati
Swirl is used in combustion systems to enhance mixing and provide flame stabilization in both subsonic and supersonic flows. In high-speed flow, compressibility effects reduce amplification rates of the span wise vortices and increase 3 dimensional instabilities, thereby producing preferential stream wise vortices. These vortices are less effective in entraining ambient flow into the mixing layers; therefore energy extraction from the mean flow is reduced and less energy is being transferred to small-scale vortical structures through vortex ...
Novel Adsorbents and Membranes for Separation and Purification of Proteins and Related Biomolecules
Organization: University of Cincinnati
Mesoporous and macroporous molecular sieves are a class of chemicals which are used as adsorbents in chemical separations and purification operations involving a broad class of biologically important molecules, including but not limited to proteins, peptides, oligonucleotides, nucleic acids, enzymes and vitamins. Functionalized versions of these materials are particularly useful in carrying out separations of high efficiency and specificity. Use of these molecular sieve materials in association with solid supports offers great promise for ...
Novel MAC Layer Protocol for Space Division Multiple Accesss in Wireless Ad Hoc Networks
Organization: University of Cincinnati
Mobile wireless ad hoc networks (MANETs) offer communication capabilities across the nodes of the network without extensive construction of an underlying infrastructure. Networks of this type can be set up easily and offer the ability to transfer voice, data, and video messages without the constraints on mobility imposed by traditional networks dependent upon wired connections. Larger networks are multi-hop in nature since a message must be transmitted across several nodes in order to reach its final destination. Currently, these networks ...
Integrated Compressor Motor, Fan-Motor, Propeller-Motor, Pump Motor and Turbine Generator
Organization: University of Cincinnati
The conventional arrangement in the case of a compressor or pump is to have a shaft connecting it to a motor. Steam and power turbines are generally connected to a generator via a shaft. We have developed a new technology which allows the turbine and generator to be integrated; motors and fans integrated. This allows for smaller, more compact, and less expensive machines. Without a shaft and motor, machines may be smaller and lighter, making hydroelectric projects more affordable and less intrusive on the environment. In the field of aircraft ...
New Catalysts for the Selective Oxidation of Propane to Acrylic Acid
Organization: University of Cincinnati
One of the major objectives of the refining and petrochemical industry is the ability to upgrade cheaper raw materials from lower to higher molecular weight in order to produce highly desirable oxygenated compounds. Specialized multicomponent vanadium molybdate mixed oxide catalysts are commonly used for this purpose. Thus far, however, catalytic oxidation of propane using such materials has produced only acetic acid, acetaldehyde, and carbon oxides. A new group of catalysts for the selective oxidation of propane to acrylic acid has been ...
Method for obtaining an Organic-Solvent-Free Stable Silane Solution
Organization: University of Cincinnati
Organofunctional and non-organofunctional silanes have been demonstrated by UC researchers to be powerful agents to prevent corrosion of metals. Many different metals can be effectively protected against a range of different types of corrosion, such as stress corrosion cracking, pitting, corrosion fatigue cracking, uniform corrosion, etc. Although silanes are easy to handle and apply, they often have the limitation that they come in the form of alkoxy esters which have to be hydrolyzed first before they can be applied to the metal. The ester ...
Pulsed Electrodeposition of Silane Films on Metals
Organization: University of Cincinnati
This process improves the quality of silane films deposited on metals for the purpose of providing corrosion protection and paint adhesion. Quality refers to uniformity, homogeneity and organization of the molecules. In silane technology thus far practiced, a metal is dipped into, or sprayed with, a silane solution. The treated metal can be rinsed with water, or can be dried without rinsing. Alternatively, a silane film can be applied by wet rolling, wiping or brushing. Films formed in any of these procedures may be porous and there is not ...
Nanoporous Vandium Phosphorus-Oxide Catalysts
Organization: University of Cincinnati
Vanadium-phosphorus oxide catalysts are useful in the selective oxidation of lower alkanes (C2-C5). However, conventional synthesis methods for mixed metal oxides such as vanadium-phosphorus oxides, both wet chemistry and solid-state, offer very limited control over desirable structural and compositional properties, such as the phase, bulk and surface compositions, preferential exposure of active and selective surface planes, surface areas and pore architecture, all of which affect the catalytic properties of these materials. A new method of ...
Water Decontamination through the use of Photocatalysts
Organization: University of Cincinnati
Dr. Peter Smirniotis and collaborators with his lab have a way to photocatalytically degrade organic compounds by zeolite and/or mesoporous material hosted photocatalysts, which is particularly useful in treating water contaminated with a number of organics. Contaminated water is a growing problem in many areas of the world. Others have used ultraviolet light radiation to eliminate organic compounds in water, but none have been commercially viable. For high rates of reactions, a broad surface area is necessary, so slurries have been used, ...
MDA: Novel MAC Protocol for Directional Antennas over Wireless Ad Hoc Networks
Organization: University of Cincinnati
A new MAC protocol was developed for use with directional antennas in wireless ad hoc networks. This protocol improves network throughput, power consumption, end to end packet delay and special reuse.
Economical Process for the Preparation of Germania Crystals
Organization: University of Cincinnati
Germania crystals are useful adjuncts in a variety of industrial processes, including the strengthening of rubber, preparation of personal care products such as toothpastes, and opto-electronic applications such as the preparation of waveguides. Traditional techniques for preparation of these materials has involved the employment of extremes of pH and various non-aqueous solvents, as well as careful alteration of process parameters such as pressure and temperature. We have developed a technique for the synthesis of germania particles which ...
Non-Ozone Depleting Vapocoolants
Organization: University of Cincinnati
This patented technology provides novel chemical compositions for use as topical anesthetics or skin refrigerants. These compositions do not cause the depletion of the stratospheric ozone layer. They are non-toxic, non-carcinogenic and less flammable than ethyl chloride. These chemical compositions match the skin temperature versus time profile needed in the management of myofascial pain syndromes, for effectively freezing skin prior to minor skin surgery and for effectively freezing skin prior to giving painless injections.
An Active Fiber Continuous Sensor
Organization: University of Cincinnati
The artificial neural system (ANS) uses a large array of continuous sensors with a minimum number of data acquisition channels. The artificial neural system detects the damage and locates it within the grid of the array. Each continuous sensor will form a neuron and the array will act as a biological neural system. The neurons will measure the dynamic strains and these signals will be interpreted to indicate if the structure is operating within the limits of its design specifications, and if there is any damage occurring to the structure. ...
Organization: University of Cincinnati
Intrusion detection is an important aspect of network security. Many current detection systems have trouble providing real-time network intrusion detection, particularly where very high dimensional data is involved. The intrusion detection system of the present invention provides real-time network intrusion detection by projecting the high dimensional dataset to a lower dimensional space using the random projection technique, then performing intrusion detection in the lower dimensional space using a support vector machine (SVM) classifier. ...
Energy Efficient Routing Protocols in Wireless Sensor Networks
Organization: University of Cincinnati
Wireless Sensor Networks are a new class of Ad Hoc networks that will find increasing deployment in coming years, as they enable reliable monitoring and analysis of the unknown and untested environment. Ease of deployment, extended range, fault-tolerance and mobility are some of the advantages of using wireless sensor nodes. These wireless sensors are expected to be extremely small and battery operated. Protocols for these networks must be designed in such a way that the limited power in the sensor nodes is used in the most efficient manner. ...
Liquid Chromatograph on a Chip
Organization: University of Cincinnati
The field of microelectromechanical structures (MEMS) involves the development of miniaturization technology to control and characterize processes with instrumentation which is orders of magnitude smaller than what is currently available. The traditional approach to on-line chemical detection has been to develop highly selective sensors. This approach has been plagued with a variety of difficulties, primarily developing suitably selective sensors for the enormous variety of problems faced. Chromatographic separation prior to detection reduces ...
Organization: University of Cincinnati
UC-SDRL Research Software currently includes the X-Modal II modal parameter estimation package, the MRIT-VXI and MIMO-VXI data acquisition package and the X-Utilities Library. X-Modal II X-Modal II is an experimental modal analysis software package developed at the University of Cincinnati, Structural Dynamics Research Lab (UC-SDRL) in conjunction with The Boeing Company. The primary function of this software package is to provide a flexible environment for analyzing data acquired for the purpose of experimentally determining the modal ...
State Based Propositional Satisfiability Solver
Organization: University of Cincinnati
In many computer related fields, such as the design of Very Large Scale Integrated Circuits, computer programs are used to solve crucial problems such as determining whether a given circuit design meets precise specifications. Since the magnitude of such problems is increasing at an enormous rate, current software is rapidly becoming incapable of meeting industrial needs. More alarming, future software will be inadequate without breakthroughs in the design of algorithms for certain computationally intensive problems. One of those problems, ...
Cross-Layer Directional Antenna MAC and Routing Protocols for Wireless Ad Hoc Network
Organization: University of Cincinnati
A new MAC and routing protocols were developed for use with cross-layer directional antennas. This technology drastically increases network throughput is and spatial reuse is considerably optimized
Turbine Rotor Cooled by Upstream Oscillating Wake Generator
Organization: University of Cincinnati
A novel approach for cooling turbine rotor blades has been devised that utilizes an oscillating wake generator. This cooling approach allows for hotter turbine temperatures or higher speed with less stress on the turbine blades. A further advantage is lower engine part count and increased engine cycle efficiency.
Organization: University of Cincinnati
This is an Active Fiber Continuous Sensor (AFCS) that has high sensitivity for measuring Acoustic Emissions (AE) and strains in structures. Previous designs use electrodes that are above the piezoceramic substrate and a strong electric field is needed to couple the charge on the fibers to the external wiring circuit. The AFCS design uses rectangular fibers cast in an epoxy matrix in a configuration in which the top and bottom surfaces of the fibers are directly in contact with conductive epoxy which also bonds directly to a structural ...
Spatial Reuse Enabling Power Control MAC Protocol for Wireless Ad Hoc Networks
Organization: University of Cincinnati
As background, power control is a determinant technique for energy conservation and thus is of fundamental importance to wireless ad hoc stations which primarily rely on limited battery power. Besides energy savings, power control can also increase the capacity of the network by enhancing spatial reuse of the wireless channel. This is a novel Spatial Reuse MAC (SRM) protocol based on the IEEE standard 802.11. This protocol accomplishes spatial reuse without a separate control channel, by employing a combination of power control and a fully ...
Elongated Angle Nozzle For Oil Drilling
Organization: University of Cincinnati
The paramount objective of drilling is to reach the target safely in the shortest possible time and at the lowest possible cost current nozzle designs suffer from inefficiency and rapid wear, resulting in increased cost of replacement and retrieval. An improved, elongated and angled nozzle for oil drilling has been developed at the University of Cincinnati. This nozzle shifts the stagnation lines, which occur underneath the cones. It works all along the cone and sweeps the bottom more efficiently. This effect is achieved by creating a swirl ...
Organization: University of Cincinnati
An operating system for user-created environments enables computer users to easily manage all available content and information resources. In addition, the system provides users with the ability to create intuitive interfaces which integrate with the same resources. The new system provides users the means to effectively address the common problems of information overload due to universal information content resources such as the Web and other large and loosely-structured databases. A major advantage of the system is the incorporation and ...
Coating Nanoparticles using Plasma Polymerization for Medical Applications
Organization: University of Cincinnati
For bio-probe applications, a bio-film has to be attached to the nanoparticle surfaces to react with the virus or DNA material. However, the surfaces of many nanoparticles are not ideal for these particular bio-films. To provide an adhesive interface between the bio-film and the nanoparticle substrate, an ultrathin polymer film, such as polystryrene and acrylic acid, is deposited on the nanoparticles or nanotubes using a plasma polymerization treatment.
Organization: University of Cincinnati
A novel sensor contains an array of analyte-specific microelectrode sensors that can penetrate samples to simultaneously perform multiple measurements. The microelectrodes are robust, yet small enough to be fabricated in close proximity to signal processing ICs. A dissolved oxygen (DO) version of the sensor array has been shown to exhibit better linearity, sensitivity and response time than similarly sized DO sensors formed from pulled glass pipettes.
Micropatterning Two Different Cell types on Biomaterials
Organization: University of Cincinnati
This methodology allows direct patterning of two different cell types on biocompatible and biodegradable substrates, such as chitosan. In this approach, an anionic cell-resistant polyelectrolyte, poly(methacry1ic acidco-oligoethyleneglycolmethacrylate) is microcontact printed as a series of 60 µm lines on a chitosan film. Monolayers of the first cell type (human vascular endothelial cells) naturally attach and proliferate only within the 20 µm lines of bare chitosan separating the 60 µm wide lines of cell resistant polyelectrolyte. The ...
Novel Sorbents for Separation of CO2 at a Wide Temperature Range
Organization: University of Cincinnati
1. Gases that occur in nature or that are produced in industrial processes often contain carbon dioxide (CO2). Because of process requirements, or because of the end result desired, it is sometimes desirable to remove carbon dioxide from a mixture of CO2 and other gases. 2. Traditional techniques for separation of CO2 in gas mixtures through absorption rely on high-aluminum zeolites, which have the disadvantage of significant mass transfer resistances, with consequent slower pressurization/depressurization steps; and competitive absorption ...
Covalent Modification of Surfaces with Polymers to Increase Biocompatibility
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Method and Apparatus for Holding Cells
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Tunable Piezoelectric Micro Mechanical Resonator
Organization: University of Pittsburgh
Medium Carbon Steels and Low Alloy Steels With Enhanced Machinablility
Organization: University of Pittsburgh
N-Vinyl Formamide Derivatives, Polymers Formed Therefrom and Synthesis Thereof
Organization: University of Pittsburgh
Regradable Polyurethanes That Incoporate Biologically Active Agents for Bone Tissue Engineering Use
Organization: University of Pittsburgh
Syringe Electrode Device for Delivering DNA VAC
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Nano-Optic Lenses and Beam Shaping Devices
Organization: University of Pittsburgh
Organization: University of Pittsburgh
New Route to Synthesis of N-Vinyl Formamide
Organization: University of Pittsburgh
Vacuum Seeding Rotational Device
Organization: University of Pittsburgh
Method and Device for Reducing Power Consumption of Active RFID Tags
Organization: University of Pittsburgh
A Wireless Autonomous Device System
Organization: University of Pittsburgh
Method and Software for Customized/Power Efficient IC Devices
Organization: University of Pittsburgh
RFID Active Asset Management over Wi-Fi
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Optimal Control of A Tandem Cold Rolling Mill Using A Pointwise Linear Quadratic Technique
Organization: University of Pittsburgh
Active RFID Tag Power Optimization Architecture
Organization: University of Pittsburgh
A Method and Product for Evaluation RFID Tag Performance
Organization: University of Pittsburgh
Communications with Multiple Carriers and Virtual Pulses
Organization: University of Pittsburgh
Fingertip Visual Haptic Sensor Controller
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Biologic Matrix for Cardiac Repair
Organization: University of Pittsburgh
Security and Item Level RFID on Blister Packs
Organization: University of Pittsburgh
Dynamic Discrete Disaster Decision Simulation System
Organization: University of Pittsburgh
Branch-and-bound Analysis Kit (BAK)
Organization: University of Pittsburgh
Triggerably Dissolvable Hollow Fibers for Controlled Delivery
Organization: University of Pittsburgh
A Physical Layer Design Automation Flow for Wireless Systems
Organization: University of Pittsburgh
A Sensor/System to Detect Bridge Scour
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Organization: University of Pittsburgh
Motion Activated Energy Harvesting Amplifier
Organization: University of Pittsburgh
Apparatus for Wireless Power and Data Transfer Over a Distance
Organization: University of Pittsburgh
New Flow-Stretch-Flexure Bioreactor for Mechanical Conditioning of Engineered Heart Valve Tissues
Organization: University of Pittsburgh
A low-cost perfusion bioreactor for tissue-engineered tubular constructs
Organization: University of Pittsburgh
Method For Controlling An Overhead Crane
Organization: University of California, Berkeley (UC Berkeley)
Organization: University of California, Berkeley (UC Berkeley)
Improved Adjustable, Quick-Exchange Spray Nozzle System
Organization: University of California, Davis (UC Davis)
There are three methods that are used today to attach a spray nozzle tip to a spray liquid supply system. The most common and historical method places the spray tip within a retaining ring that is screwed onto a nozzle body. A more recent technique places the spray tip within a plastic cap which seats onto a plastic base and seals with a quarter turn. A new system, developed for industrial spraying, uses a nozzle orifice that is molded into a slotted cap that fits into a plastic body and is seated with a quarter turn. Researchers at the ...
Magnetic Resonance Compatible Electric Motor
Organization: University of California, Irvine (UC Irvine)
University of California, Irvine researchers have developed a high torque and novel electric motor that operates in high magnetic fields without degrading the quality of MR images. The motor may be constructed without paramagnetic materials.
Highly Efficient Ocean Wave Energy Converters
Organization: University of California, Berkeley (UC Berkeley)
A Method for Gold Coating of Rare Earth Nano-Phosphors and Uses Thereof
Organization: University of California, Davis (UC Davis)
Researchers at the University of California, Davis have developed novel core-shell architecture nanoparticles that consist of a gold shell and a phosphor core. These particles are developed using a simple, robust one pot water based technique to coat gold on rare-earth fluoride containing nanometer sized phosphors. The uncoated phosphors are white, while the gold coated phosphors have distinct reddish tints that arise from the surface plasmon resonance of the gold shell. The tunable visible color together with the phosphor emission offers ...
Organization: University of California, Davis (UC Davis)
Alginates have been used for decades for the encapsulation of biological molecules, cells and chemicals. The traditional encapsulation process involved dissolving or dispersing the active agent in a sodium alginate solution, forcing the solution through an orifice to form a droplet which was then cross-linked by contact with a calcium chloride solution. This process was not easily scaled-up and was limited to particles larger than 500 μm. Spray-drying would be a commercially viable process to form a calcium alginate matrix ...
Mass-Producible Vacuum Photon Detector and a Method of its Production
Organization: University of California, Davis (UC Davis)
A novel vacuum photosensor and the method for its production are described. The vacuum seal of this photosensor, made entirely of glass or quartz, is provided by the oxide-free indium sealing technique, developed by a researcher at the University of California, Davis. The individual elements (pixels) of the present invention may be seamlessly combined into a flat-panel array that provides light detection without dead area. The two thin-film deposited sealing areas serve at the same time as high voltage throughputs. There are the only two ...
Coating Luminescent Phosphors for Lighting and Display Applications
Organization: University of California, Davis (UC Davis)
The invention is a new way of coating luminescent phosphors used for lighting and display applications. It is common practice to coat phosphors particles to improve the electrical and/or thermal conductivity, to passivate the particle surface in a manner which reduces the amount of non-luminescent "dead-space" material, and to improve the surface conditions in a manner which enables adhesion to a substrate (glass envelope of a lamp or the faceplate of a display). Current practice is to coat the particles and then deposit the ...
New Multiphase LLC Resonant Voltage Regulators for Next Generation Microprocessors
Organization: University of California, Irvine (UC Irvine)
University researchers have developed a new multiphase LLC resonant converter to address these next generation needs. Compared to today's buck type Voltage Regulators (VR), the proposed VR features zero voltage switching for both inverter and rectifier switches, a wide load range, a limited frequency range, a faster dynamic response, high efficiency, automatic current sharing ability, no additional current sensor and control circuitry.
Non-destructive Method Of Determining The Position And Condition Of Reinforcing Steel In Concrete
Organization: University of California, Berkeley (UC Berkeley)
Bandwidth Improvement And Distortion Reduction In Closed-box Loudspeaker Systems
Organization: University of California, Berkeley (UC Berkeley)
Broadband Distributed-Mass Micromachined Gyroscope
Organization: University of California, Irvine (UC Irvine)
University researchers have invented a distributed-mass micromachined gyroscope which minimizes quadrature error, eliminates effects of directional residual stresses, and completely decouples the drive and sense modes. The device has multiple drive-mode oscillators, distributed symmetrically around the center of a supporting frame. The multi-directional linear drive-mode and the rotational sense-mode allows complete decoupling of the drive and sense direction oscillations, minimizing instability and zero-rate drift due to dynamical coupling ...
High-Isolation Tunable MEMS Capacitive Switch
Organization: University of California, Irvine (UC Irvine)
University researchers have developed a high isolation switch capable of obtaining C-band frequencies, without the need for changes in current process, and with minimum modifications is current switch designs.
Nanophotonic Device Employing Nanowell-Housed Nanoparticles For Ultrasensitive Bioassays
Organization: University of California, Davis (UC Davis)
Researchers at UC Davis have developed a nanowell assay format that enables increased sensitivity compared to conventional assays. This sensitivity is a result of unique nanophotonic effects afforded by the periodicity of the structures on a multilayered chip.
KSK Micro Device For Noise Control During Approach To Land Phase Of Aircraft
Organization: University of California, Davis (UC Davis)
During airport approach, when the engines of an aircraft are near idle condition and when the high-lift systems and landing gears are deployed, airframe noise is the dominant noise source. Any increase in the deflection angle of leading-edge slat and trailing-edge flap will lead to an increase in airframe noise level. This noise causes a disturbing influence in the surrounding environment, given that it is generated and radiated into the environment at a relatively low flight altitude. For this reason, noise level regulations are becoming ...
Formation of polymers on nanostructures under X-ray irradiation
Organization: University of California, Davis (UC Davis)
Researchers at UC Davis have developed methods of formation of a polymer from a monomer on a metal-based nanoparticle under X-ray irradiation or the dissolution of metal ions from this nanoparticle under X-ray irradiation, and more specifically methods of enhancing formation of a polyanilne polymer from an aniline monomer on a silver core - gold shell nanoparticle under X-ray irradiation and release of Ag ions from this core-shell nanoparticle. X-rays are highly penetrating, and nanomaterials can pinpoint the growth of polymers down to ...
Organization: University of California, Davis (UC Davis)
A typical green roof system comprises of several layers of material suitable to support vegetation on a roof. These layers are typically supplied in bulk or earthen rolls that are rolled into position on the roof. However, these prior systems have several disadvantages. First, the systems are relatively expensive and require the need for expertise for installation. Second, these systems often require reroofing and are not designed to be retrofitted on existing roofs. Finally, a significant amount of residential roofs in particular are unable ...
Interpaper Spacing Control In A Media Handling System
Organization: University of California, Berkeley (UC Berkeley)
Efficient Solar Concentrator With A Low-Cost Tracking Mechanism
Organization: University of California, Merced (UC Merced)
University of California, Merced (UC Merced) researchers have invented a new type of solar concentrator that enables one to greatly reduce the cost of the tracking mechanism while employing a reflective surface with a very large area in relation to the size of the light-absorbing element. In this new UC Merced concentrator, only the light absorbing element needs to be moved in order to track the Sun, while the reflective surface remains fixed. The geometry of the concentrator design guarantees that high efficiencies can be maintained. ...
Tunable, Full-Color Electroluminescent Array
Organization: University of California, Riverside (UCR)
Researchers at the University of California have developed Hybrid Organic-Inorganic LEDs based on Quantum Dots (QDs). QDs have narrow band emission and their color emission can be tuned in the full visible spectrum by varying their size. QDs also have easy processibility and can be laid into thin films by simple techniques. By integrating QDs with polymers on a nanometer scale, the researchers were able to build tunable, full color LEDs with a low voltage threshold.
A Novel Process To Detect Errors In Compilers And Program Transformation And Analysis Tools
Organization: University of California, Davis (UC Davis)
Based on the invented general method, the inventors have developed prototypes that have been used to find new errors in the most widely used open-source and commercial compilers. The invention is general and can be easily applied to finding errors in any compiler or software tools targeting any programming language. It provides concrete test cases that trigger the detected errors and help localize and debug the discovered errors. It can also be used to construct comprehensive test suites for compiler and tool validation and ...
Improved Aplanatic Solar Concentrators
Organization: University of California, Merced (UC Merced)
Researchers at the University of California, Merced (UC Merced) have invented an aplanatic concentrator design with surface geometries arranged according to a novel 3-dimensional mathematical solution for minimizing aberrations. The UC Merced design can reach the thermodynamic limits of efficiency with reasonably wide acceptance angles (about 2° or greater) and high concentration levels (greater than 1,000).
Combined Heat and Power Solar System
Organization: University of California, Merced (UC Merced)
A researcher at the University of California, Merced has invented a novel non-imaging vacuum tube solar collector, which was designed normally to be used for heat generation, to directly generate both electrical energy and heat. The innovative apparatus includes an evacuated enclosure and an inner tube as the absorber. The inner tube comprises selective surface of rigid material coated with a photovoltaic layer, the selective surface converts a portion of the incident light to heat, and the photovoltaic layer converts a portion of the ...
Improved Mechanical Contact Reliability and Energy Efficiency for CMOS Applications
Organization: University of California, Berkeley (UC Berkeley)
Improved Luminescent Solar Energy Concentrator
Organization: University of California, Merced (UC Merced)
A luminescent solar energy concentrator comprises an apparatus, which includes an optical waveguide containing quantum dot material or other suitable luminescent materials that responds to incident light by emitting frequency-shifted light. Researchers at the University of California, Merced improved the waveguide by further employing a highly efficient diffusely-reflecting bottom layer in conjunction with a narrow-band reflecting top layer to the wave-guide. The innovation significantly raises the overall energy conversion efficiency range ...
Thermodynamically Efficient Solar Thermal Concentrators
Organization: University of California, Merced (UC Merced)
A research at the University of California, Merced has revealed the methodology that provides a pathway for the designers to make rational and optimal design choices of the reflector and absorber configuration in an evacuated solar thermal tube. By incorporating the new concentrating principle and improving the reflector technology, the UC Merced research also developed a prototype solar collector, which is cost effective single ended tube with metal cylindrical absorber inside an evacuated glass envelope. The innovative collector has thermal ...
Electrically Pumped UV Laser Diodes and UV LEDs
Organization: University of California, Riverside (UCR)
Gallium Nitride (GaN) LEDs and laser diodes are currently in use for many applications, but these suffer from several drawbacks. GaN laser diodes emit from the edge, not the surface, which requires bulky structures and advanced engineering to align them in useful orientations. University of California researchers have developed novel UV ZnO diode lasers on Si that overcomes many of the shortcomings of GaN devices. · UC has developed electrically pumped ...
Kohler Homogenizer For Aplanatic Solar Concentrator
Organization: University of California, Merced (UC Merced)
Researchers at the University of California, Merced have improved the optical system design based on principle of combining aplanatic optics with Köhler illumination. The new type of solar concentrator effectively produces a desirable uniform irradiance on the solar cell by placing a Köhler lens near the focal plane of the aplantic sytem. This is different from the previous design by the group, where the Köhler element was integrated into a two reflector aplanatic system.
Organization: University of California, Los Angeles (UCLA)
Scientists at the University of California have developed a new version of the L-COSY sequence which uses only three radio-frequency (rf) pulses for localizing the voxel (CABINET sequence as an 1D analog) and recording the two-dimensional MR spectra (L-COSY: 2D analog). This added second dimension improves resolution, decreases the overlap of the peaks, and detects additional brain metabolite resonances close to the most dominant water peak.
Simple, Inexpensive Fiber-based Optical Trap/Microfluidic System
Organization: University of California, Merced (UC Merced)
University of California, Merced (UCM) scientists have invented a novel fiber-based dual-beam optical trap/microfluidic system that is simple, compact, and inexpensive to construct. Its chip can be fabricated using standard plexiglass, resistive wire, optical fiber, and a relatively simple heat-etching platform. The UCM system is capable of maintaining a precise alignment (comparable to much more complicated optical traps) in an integrated, robust package that is small enough and rugged enough for use in standard microscopes.
Method For Electronic Noise Reduction In Graphene Devices
Organization: University of California, Riverside (UCR)
Two-Dimensional Graphene Lattice
Horizontal Current Bipolar Transistor
Organization: University of California, Los Angeles (UCLA)
Scientists at the University of California have produced a novel transistor device, named the Horizontal Current Bipolar Transistor (HCBT), that can improve the characteristics and performance of integrated circuits that contain bipolar devices.
Low-Power Booth-Encoded Carry-Save Array Multiplier
Organization: University of California, Los Angeles (UCLA)
Scientists at the University of California have developed a novel "reorganized" but regular partial-product addition scheme that demonstrates all of the advantages of the traditional carry-save array while reducing power dissipation.
Two Single-phase Controllers to Realize a Three-phase Power Factor Corrected Rectifier
Organization: University of California, Irvine (UC Irvine)
University researchers have designed topologies and control schemes that further simplify three-phase rectification circuits, demonstrating that the unified three-phase constant vector controller can be decoupled into two single-phase PFC controllers for two special groups of topologies. Therefore, the design of a three-phase PFC is dramatically simplified, furthermore all techniques and experiences used in single-phase PFC rectifier can be easily adopted by three-phase applications.
Organization: University of California, Los Angeles (UCLA)
Scientists at HRL Laboratories, Boeing, and the University of California have developed a novel micromachining method for tuning mechanical resonators. Very small amounts of material can be removed at a sufficiently slow rate in order to adjust the resonator frequency to the desired value.
Turbine Design Optimized for Wet Operation
Organization: University of California, Berkeley (UC Berkeley)
Organization: University of California, Irvine (UC Irvine)
The robust mode corresponds to operation between the 2-DOF sense mode resonant frequencies providing a response gain and bandwidth controlled by frequency spacing. Precision mode of operation, however, relies on mode matching the drive to the second, anti-phase sense mode resonant frequency which can be designed to provide a gain advantage over a similar 1-DOF system. Experimental rate characterization of an SOI prototype in air for both robust and precision modes revealed scale factors of 0.282 and 0.690 mV/deg/s respectively. The ...
Vertical Gate-Depleted Single Electron Transistors
Organization: University of California, Los Angeles (UCLA)
Scientists at the University of California have developed a novel approach to fabricating these devices which greatly simplifies the process while allowing the gate to be split into multiple gates.
Micromachined Tuning Fork Gyroscopes With Ultra-High Sensitivity And Shock Rejection
Organization: University of California, Irvine (UC Irvine)
Unlike conventional tuning fork gyroscopes, the proposed architecture prioritizes the quality factor of the sense-mode by mechanical design, where the linearly coupled anti-phase sense-mode is balanced in both the linear momentum as well as moment of reaction forces (torque) in order to minimize dissipation of energy through the substrate and enable ultra-high mechanical sensitivity to the input angular rate. The second, quadruple mass design builds upon the dual mass architecture by coupling together two dual mass devices to achieve ...
Fast Sensitive Hydrogen Gas Detection Using Single Palladium Nanowires
Organization: University of California, Irvine (UC Irvine)
UC Irvine researchers have developed a method which has demonstrated that by controlling the grain structure of a palladium nanowire, nanowires operating in either the RH2( ) or the RH2(-) modes can be obtained. Superior H2 sensing performance, including response times in the 1-5 s range at high H2 concentrations and a LODH2 of 2 ppm have also been demonstrated for single Pd nanowire sensors operating in the RH2( ) mode that did not break upon exposure to H2.
High Aspect Ratio FinFET For High-Density CMOS/BiCMOS Applications
Organization: University of California, Los Angeles (UCLA)
Scientists at the University of California have developed a novel high aspect ratio FinFET (HR FinFET) that overcomes these limitations, while also improving their characteristics. This invention enhances the capabilities of FinFET to extend conventional CMOS performance.
Beams Of Nanodroplets For High Sputtering Rate Of Inert Materials
Organization: University of California, Irvine (UC Irvine)
There exists a need to carve hard materials for IC and MEMS fabrication. For very hard, inert materials such as silicon carbide, a main fabrication tool is physical sputtering via Ion-Beam Milling (IBM). This process has the lowest etch rate and wafer throughput among subtractive techniques. The slow etch rate of the state-of-the-art IBM cannot be significantly corrected because the space charge that forms between the plasma and the extraction grids of the ion source imposes a fundamental limit on the beam current density, and thus on the ...
Method For Achieving Minute-Long Spin Relaxation Times For Alkali Atoms
Organization: University of California, Berkeley (UC Berkeley)
Biologically Inspired Self-Activated Building Envelope Regulation (Saber)
Organization: University of California, Berkeley (UC Berkeley)
Organization: University of California, Berkeley (UC Berkeley)
Three-Dimensional Wafer-Scale Batch-Micromachined Angle/Angular Rate Microshell Resonator Gyroscope
Organization: University of California, Irvine (UC Irvine)
One implementation of the isotropic oscillator concept, the quartz hemispherical resonator gyroscope (HRG), demonstrated the potential of rate integrating gyroscopes with inertial grade performance. HRG, however, is extremely difficult to fabricate because individual meso-scale quartz shell is manually machined with high precision. Although conventional HRG is widely used for precision inertial navigation and guidance applications, it is not suitable for man-portable application because of its size, weight and power (SWAP) metrics. University ...
Low Radiation Slotline Baluns For Wideband Wireless Applications
Organization: University of California, Berkeley (UC Berkeley)
A Double-Dose Ebeam Lithograpy Process
Organization: University of California, Irvine (UC Irvine)
Researchers at UC Irvine have developed a double-dose exposure process which easily achieves both higher linewidth resolution and a large undercut. Using this process, a top linewidth of 40 nm and undercut of more than 400nm can be achieved. This technique is important for electronic device applications such as the fabrication of single electron transistors.
Snap-Action Bistable Micromechanism Actuated By Nonlinear Resonance
Organization: University of California, Irvine (UC Irvine)
In this invention, researchers have developed a bi-stable micromechanism utilizing structural resonance phenomena to switch dynamically between the states resulting in improved performance times and lower voltage actuation.
A Method For Electrochemical Deposition And Modification
Organization: University of California, Irvine (UC Irvine)
Electrochemistry requires the precise control of voltages and currents at three electrode wires. Dedicated instruments called potentiostats or galvanostats are commercially available to accomplish control. However, UCI researchers have developed a new technique using simply a “4-wire” resistance meter resulting in a less expensive and highly versatile device allowing complex electrochemical experiments to be performed beyond those normally possible with standard potentiostats.
Augmentation Of Conventional Passive Heat Transfer
Organization: University of California, Berkeley (UC Berkeley)
Beam-Mass System for Auto Tuning or De-Tuning of Resonant Frequency Relative to Ambient Vibration
Organization: University of California, Berkeley (UC Berkeley)
Micromachined Magnetic Actuators
Organization: University of California, Los Angeles (UCLA)
This group of microactuators represents a new class of surface and bulk micromachined electromagnetic and magnetic actuators that have a variety of Micro Electro-Mechanical Systems (MEMS) applications. These microactuators have an out-of-plane rectangulor flap configuration with cantilever beams that are bent by magnetic force deflection of either an electromagnetic coil or a permalloy (e.g. 50/50 FeNi) microstructure deposited on the microflap surface. This configuration allows relatively large vertical deflections of greater than 100 m in ...
Orthogonal Space-Time Block Codes: Reduced Complexity Maximum Likelihood Detection
Organization: University of California, Irvine (UC Irvine)
Wireless communication systems often employ orthogonal Space-time code blocks (MIMO’s). Researchers at UCI’s Department of Electrical and Computer Engineering have developed a series of algorithms that reduce the computational power required for these codes substantially (by orders of magnitude) based on the real-valued lattice representation and QR decomposition. The core of the algorithms show that for t = K/T , where K is the number of transmitted symbols per time T slots, the UCI algorithms decompose the original complex ...
3-D Printed Fiber-Reinforced Structural Concrete Polymer
Organization: University of California, Berkeley (UC Berkeley)
Litho-particle Dispersions: Designer Particles with Customizable Shapes
Organization: University of California, Los Angeles (UCLA)
The invention described here uses directed, top-down processes facilitated by automated lithography, for rapid, massively parallel, high throughput production of particles of customizable shapes that exhibit high fidelity and uniformity. As a demonstration of the power of this invention, UCLA researchers have designed and fabricated colloidal alphabet soup: a dispersion of microscale polymer particles representing all twenty-six letters of the English alphabet in a viscous liquid. Submicron and nanoscale particles can be created by the same ...
A Cmos Integrated Broadband Absorptive Microwave Multiplier
Organization: University of California, Irvine (UC Irvine)
During the first part of the last decade several new bands were opened worldwide for ultra-wideband applications including data communications and automotive radars both of which have need for a fast switching circuit for high frequency pulse generation. In the past this was addressed by methods and devices that resulted in larger size, higher cost and greater power consumption. Researchers at UCI have developed a CMOS integrated broadband absorptive microwave amplifier that 1) uses no inductors thus leaving a small footprint 2) ...
Interference Cancellation And Detection Using Precoders
Organization: University of California, Irvine (UC Irvine)
The existing technologies used to avoid or reduce interference in wireless communication systems both lack effectiveness and consume valuable (expensive) bandwidth resources. The purpose of this UCI invention is to cancel the interference without using bandwidth, time, frequency, antenna or any other resources in the system. The main idea is to use channel information to cancel the negative effects of interference from other users. With a goal of achieving full diversity and low decoding complexity, researchers at UCI have designed, ...
Folded Micro-Gyroscope With Nuclear Magnetic Resonance Sensing
Organization: University of California, Irvine (UC Irvine)
In an NMR gyroscope, the net magnetization of a group of nuclear spins creates an inertial frame of reference. If an angular rate is applied to the gyroscope , the precession rate of the spins, or the Larmor frequency, will appear to be changed when the observed in the rotating coordinate frame so by monitoring this frequency the angular rate can be extracted. By using diverging beam geometries, a single light source and differential detection, UCI researchers have developed a miniature NMR gyroscope that has the following desirable ...
Multilayer Reflective Coating For Micro-Cavity Sidewalls
Organization: University of California, Irvine (UC Irvine)
Miniature vapor cells form the central elements in emerging MOEMS technologies based on the transitions of alkali gases. The fabrication process and cell coating design developed by UCI researchers functions in two ways: As a vapor cell and as an optical return. First, as a cavity or cell, it contains the gas vapor that provides the sensing capability to the instrument and secondly as an optical retro-reflector such that the sidewalls of the cell are used as reflective elements to direct the light used in the polarization and probing of ...
Ultrahigh Sensitivity Quartz Crystal Microbalance
Organization: University of California, Irvine (UC Irvine)
Researchers in UCI’s Department of Physics fabricated nanoporous alumina structures on QCM’s by electrochemically anodizing aluminum electrodes and have shown that these electrodes are very sensitive to the partial pressure of water and thus make excellent, high Q humidity sensors. By applying nanoporous structures as electrodes for QCM’s, using various techniques including evaporation, electrochemistry, spin-coating and selective etching the relative surface area is enhanced without sacrificing Q. The resulting sensors ...
Porous Carbon On-chip Energy Storage Devices
Organization: University of California, Berkeley (UC Berkeley)
Recycle Gas Cooled Solid Oxide Fuel Cell (Rgc-Soft).
Organization: University of California, Irvine (UC Irvine)
There are various types of fuel cells, each classified according to the type of electrolyte used in the cell. IN the solid oxide fuel cell (SOFC), the electrolyte consists of a solid, nonporous metal oxide. A major advantage of the SOFC over other types of fuel cells is its high exhaust temperature. Current SOFC’s operate near 1000° C with recent developments moving that figure towards 700° C. In a fuel cell, there are losses that limit the conversion of fuel-bound energy to electricity due to i) irreversibilities due to ...
Noise Reduction Device for CO2 DCD
Organization: University of California, Irvine (UC Irvine)
The DCD laser systems on the market today are facing a serious challenge due to the upcoming ban of R-134A, the coolant used in the DCD for a variety of laser therapies. CO2 is a frontrunner replacement coolant for R-134A due to its low global warming potential and low cost. However, due to the higher pressure of CO2, the noise made during release and treatment can be a distraction to the physician performing the procedures and an annoyance to the patient. Researchers at UCI’s Beckman Laser Institute are addressing this issue with new ...
Application Of Fuel Cells In Gas Turbine Power Plants
Organization: University of California, Irvine (UC Irvine)
Researchers at UCI’s National Fuel Cell Research Center have developed an application of high temperature fuel cells (such as molten carbonate and solid oxide) operating near atmospheric pressure in gas turbine based power plants. The concept consists of utilizing the exhaust heat from the fuel cell to reform the gas turbine fuel prior to firing in the turbine. For a gaseous fuel, the fuel may be humidified directly by contact with hot water in a counter-current packed column to generate the “steam” required for the ...
Methodology for Solving in Real-Time Linear Programming Problems with Analog Circuits
Organization: University of California, Berkeley (UC Berkeley)
Improved Condensation Technology
Organization: University of California, Berkeley (UC Berkeley)
Micro Electromechanical Switch Design with Self Aligning and Sub-Lithographic Properties
Organization: University of California, Berkeley (UC Berkeley)
Microfluidic Device Using Dielectrophoresis Separation of Heterogeneous Cell Populations
Organization: University of California, Irvine (UC Irvine)
Single-Layer Microfluidic Device
Organization: University of California, Berkeley (UC Berkeley)
CMOS High Frequency Distributed Active Balun
Organization: University of California, Irvine (UC Irvine)
The proposed distributed active balun uses distributed architecture with a single-ended input line and differential output lines to improve the gain-bandwidth product. The distributed balun includes multi-stage gain cells to increase power gain. Each gain stage employs new bandwidth-enhancement circuitry to compensate for bandwidth degradation due to multi-stage design. The resulting distributed active balun has been implemented in 65nm CMOS technology. Measurement results show an active gain of 4dB across bandwidth >70GHz (measurement ...
Wireless Monitoring Device Screens Infants, Determines Risk Of Neurological Disorder Development
Organization: University of California, Irvine (UC Irvine)
High Range Digital Angular Rate Sensor Based On Frequency Modulations
Organization: University of California, Irvine (UC Irvine)
Conventional gyroscopes suffer from the following major limitations: analog output narrow bandwidth linear range and temperature sensitivity Currently these problems are solved by: digitizing the inherently analog output signals (which increases the power consumption and degrades noise performance) sensors (which results in temperature lags and hysteresis). UCI researchers have developed a digital angular rate sensor based on frequency modulation (FM) of the rotation rate. The new approach relies on tracking of the ...
Organization: University of California, Irvine (UC Irvine)
Certain organisms commonly found in wastewater are prone to rapid growth or "blooming." If these organisms are not detected early in the treatment process they tend to bulk up and foam thus developing into a very costly problem in terms of waste disposal as a function of increased solid separation difficulties as well as possible regulatory fines. Alternatively, if these organisms are detected at an early stage and treated promptly substantial cost savings can be realized. Currently in the marketplace the techniques and equipment needed to ...
Organization: University of California, Los Angeles (UCLA)
The innovation is a detector that monitors membrane scaling in real time, thereby enabling timely anti-scaling measures to be used before irreversible membrane damage. The innovation consists of a specially designed plate-and-frame high pressure RO membrane cell with optical windows. The feed solution can be fed to the cell from any side-stream in the RO plant. Pressure, feed and permeate flow rates, conductivity and pH are continuously monitored. A unique optical imaging system provides real-time imaging of the membrane surface capable of ...
Floating-Non Contact Wireless Voltage Sensor For High-Voltage Transmission Lines
Organization: University of California, Irvine (UC Irvine)
With energy consumption already at record levels and projected to be on the rise, it is increasingly important to have the ability to dynamically monitor the voltage levels present on transmission lines and the flow of power through the interconnected power grids within both the United States and abroad. According to the U.S. Department of Energy, electric energy consumption within the United States during 2009 was estimated at 3,745 terawatt-hours with a projection of steadily rising to 4880 terawatt-hours by the year 2035. Although other ...
Quiet Bleed Valve For Gas Turbine Engine
Organization: University of California, Irvine (UC Irvine)
Photolithography High Resolution Patterning
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
Method for Counter-Centrifugal Liquid Transfer on a CD Platform
Organization: University of California, Irvine (UC Irvine)
Centrifugal Microfluidic System With Continuous Flow Reciprocation
Organization: University of California, Irvine (UC Irvine)
Stiction Repair For MEMS Structures And Devices
Organization: University of California, Los Angeles (UCLA)
A non-contact process has been developed to over come the MEMS stiction problem. Laser spallation is an innovative technology for de-adhering and measuring adhesion strength of film and multilayer film interfaces. Typically, a nanosecond duration pulse from a Nd:YAG laser is used to launch a compressive stress wave into the substrate. This compressive stress wave travels through the substrate and film. Upon reaching the free surface it is reflected as a tensile wave. It is this tensile wave, that upon reaching the thin film interface, ...
Shrink-Induced Antimicrobial Surfaces In Consumer Plastics
Organization: University of California, Irvine (UC Irvine)
Adaptable Wettability-Enabled Surfaces Ordered On Molded Etched Substrates
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
A variety of small animal imaging systems allows longitudinal imaging of cancer mouse models and thus the monitoring of natural or perturbed evolution of the processes in vivo in such mouse models. Meanwhile, optical imaging in absorption, fluorescence and bioluminescence mode has opened a new era in whole body small animal imaging. However, the main limitation has been the low resolution and quantitative accuracy of the images due to the highly scattering nature of tissue.To address this problem, PMI images are captured using the unique ...
Temperature Modulated Fluorescence Tomography
Organization: University of California, Irvine (UC Irvine)
Adaptive Biological And Chemical Digital Assays In Microfluidic Droplets
Organization: University of California, Irvine (UC Irvine)
Droplet microfluidic systems are extremely versatile due to their ability to transport and precisely generate fluid volumes of each individual droplet.Current methods to sort droplets involve size-based sorting using “active” sorting mechanisms coupled with optical or electrical sensing mechanisms.New methods of developing more “passive” droplet sorting methods would be very useful for scientists and would reduce the expenses associated with “active” sorting techniques.Researchers at the University of ...
Cell Destruction Method to Eliminate/Remove Unwanted Subpopulations of Cells
Organization: University of California, Irvine (UC Irvine)
Fluorescence activated cell sorting (FACS) is an important technique that has become the standard method to isolate subpopulations of cells.However, FACS has limited use in cases where the cells of interest do not have specific cell surface markers (e.g., isolating neuronal progenitors or astrocytic progenitors from neural stem or progenitor cells).New methods that allow for separation of cells that do not require advanced cell labeling would be an important tool for researchers.Researchers at the University of California, Irvine have ...
Lateral Cavity Acoustic Transducer As An On-Chip Cell/Particle Switch
Organization: University of California, Irvine (UC Irvine)
Organization: University of California, Irvine (UC Irvine)
Method And System For Ultra-High Dynamic Range Nucleic Acid Quantification
Organization: University of California, Irvine (UC Irvine)
Real-time, label-free detection of nucleic acid amplification in droplets
Organization: University of California, Irvine (UC Irvine)
DNA amplification finds tremendous applications in medicine, microbiology, and forensic science.One of the more widely used methods for detection of DNA amplification in droplets involves the use of a fluorescent probe, such as the Taqman probe.However, the use of a fluorescent marker is expensive and requires additional processing steps.A label-free method to monitor the amplification of DNA in flowing droplets would be a desirable improvement for researchers and scientists.Researchers at the University of California, Irvine have developed a ...
Self-Calibrating Micro-Fabricated Resonant Load Cells
Organization: University of California, Irvine (UC Irvine)
Multi-Axis Chip-Scale Mems Inertial Measurement Unit (Imu) System Based On Frequency Modulation
Organization: University of California, Irvine (UC Irvine)
Traditional inertial MEMS sensor architectures rely on amplitude detection, where the inertial input produces an Amplitude Modulation (AM) of the sensor proof mass displacement. This creates traditionally irresolvable limitations on the device gain-bandwidth and dynamic range. Also, fundamental limitation of the described conventional architecture comes from the necessity to precisely measure extremely small analogue signals. In the best case scenario, AM readout with pre-selected low-noise electronic components can only achieve a resolution ...
A Novel Scanned-Stylus Atomic Force Microscope
Organization: University of California, Santa Barbara (UC Santa Barbara)
Atomic force microscopes (AFMs) are extremely high resolution surface measuring instruments. Surface features on the sample interact with an AFM stylus, which is mounted on a flexible cantilever, and cause the cantilever to deflect. Currently available AFMs measure cantilever deflections by relying on an "optical level," a device which employs reflective cantilevers and laser emitters and detectors to track sub-nanometer deflections of the cantilever. However, even these sensitive AFMs exhibit a number of limitations: (1) the laser must be ...
Quantum Dot Fabrication Process
Organization: University of California, Santa Barbara (UC Santa Barbara)
Quantum dots possess unique properties that could potentially revolutionize existing optical and electronic technologies as well as open up new technologies. Conventional quantum dot fabrication techniques, however, have several drawbacks, such as large recombination velocities and surface depletion, that arise from having the surface exposed while patterning the substrate before or after growth. Researchers at the University of California have developed a quantum dot fabrication process that does not require any processing steps either ...
Method To Fabricate Sensors On The Tips Of Atomic Force Microscope Probes
Organization: University of California, Santa Barbara (UC Santa Barbara)
When designing and fabricating materials (e.g., semiconductor devices), engineers need to monitor the composition and properties of samples. Typical analysis methods include atomic force microscopy, scanning optical microscopy, and transmission electron microscopy. Often more than one technique must be used to obtain the needed information. Making multiple analyses can be time consuming and delay the development of products. Scientists at the University of California have designed a method to fabricate multipurpose sensors on the tips of ...
A New Tool For Precision Machining
Organization: University of California, Santa Barbara (UC Santa Barbara)
Precision machining is an important emerging technology with manufacturing applications in diverse fields such as optics, microelectronics, magnetic and optical recording, and manufacture of sensors and actuators. With trends in miniaturization, the need to develop new tools to shape materials at micrometer and nanometer scales will persist. Diamond turning machines provide the best precision for rapid shaping of planar and non-planar materials with depths-of-cut ranging from 1 to 50um and surface finishes about 0.5-10nm. Attempts to ...
Technique For Creating Buried Blocking Layers For Vertical-Cavity Lasers And Other Devices
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a powerful new method for constructing insulating or metallic buried layers deep within a semiconductor substrate. The method uses the patterned fusion of two semiconductor wafers to create voids that can be filled with insulating or conducting materials before or after wafer fusion. It can be used to create all-epitaxial vertical-cavity laser (VCL) structures, as well as discrete and integrated semiconductor devices.
Heat Transfer Enhancement in Pipe-in-pipe Heat Exchangers Using Magnetohydrodynamic Effect
Organization: University of California, Los Angeles (UCLA)
Researchers at UCLA have created a magnetohydrodynamic (MHD) driven swirl flow enhancement that produces a 2 to 3 time increase in the heat transfer coefficient with minimal drop in pressure. External electromagnetic power is applied directly to the liquid without any mechanical devices, and can be adjusted easily to meet specific heat exchanger needs. Heat transfer can be promoted in either a laminar or turbulent flow. All of these features provide enormous design flexibility making the proposed concept very attractive for various ...
Organization: University of California, Irvine (UC Irvine)
This novel 3D hybrid tissue involves a superelastic mesh that is enclosed with biological tissue. The tissue has layers of cells that are similar to those layers observed in human heart valve tissue or blood vessels or other constructs. The 3D hybrid heart valve tissue consists of endothelial cells and valvular interstitial cells and this is similar to human heart valve tissue. The ability of this hybrid tissue to regenerate and its durability would result in greatly reduced rates of valve failure and the requirement for a second surgery ...
High Sensitivity Atomic Force Microscope
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UC-Santa Barbara have developed a high sensitivity deflection detection device that uses a light spot, with improvements to reduce detection noise and thermal drift and allow for higher signal-to-noise ratios of measurements of the beam deflection. Such a device is illustrated by an atomic force microscope. The invention provides improvements involving the incident beam as well as a detection system and it incorporates a variety of strategies that individually, and in particular in combination, provide higher ...
Microscope Set-up to Study Mechanical Loads Applied to Substrates in Real-Time
Organization: University of California, Irvine (UC Irvine)
The biaxial mechanical loading device applies uniaxial and biaxial loads to a substrate of interest under microscopy. The device includes four loading grips, one stage insert, one platform, four pulleys, four tension control screws and four force gauges. Four digital force gauges were used to monitor the force exerted on each grip in real time. A pulley system with thin cables couples the grips that hold tissue segments or other substrates of interest to the connectors on the force gauges. The biaxial mechanical loading device has a ...
Surface Modification of Endovascular Devices
Organization: University of California, Los Angeles (UCLA)
Researchers at UCLA have discovered a method of treating Nitinol sheets, wires, or stents that overcomes the limitations of these devices in current practice. The devices are treated with a type of light, causing them to take on super hydrophilic properties. This conversion increases the affinity between the device and vascular tissue, resulting in the acceleration of the healing process and a reduction in clotting. The hydrophilic device also demonstrates less friction during insertion or delivery.
Improved Capacitive Microelectromechanical Switches
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed an improvement upon the traditional MEMS design. In this new switch, the contact of the movable membrane and the metallic layer is made intimate through an original design fabrication process. In addition, the contact with the dielectric layer is made independent of the geometry of the membrane, enabling an optimized design of the switch.
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel type of mesoscopically organized inorganic/organic block copolymer composites that can be doped with dyes or complexes to make them suitable for several optical and sensing applications.
Heterogeneous Composite Semiconductor Structures For Enhanced Oxide And Air Aperture Formation
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel heterogeneous composite oxide aperture. In this method, the shape and size of the aperture can be arbitrarily controlled and tailored to maximize the effectiveness by changing the compositions and thicknesses of the individual layers.
Mems Resonators Robust To Process-Induced Feature Variations
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel design method that allows the resonator to be robust to fabrication error, particularly to photo- and etch-induced variations in line-width.
Backside-Illuminated Photoelectrochemical (Bipec) Etching
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel etching process that utilizes photo-generated holes to permit the electrochemical etching of a material, such as a III-Nitride, under conditions with which it would otherwise not etch. Depending upon the conditions and materials used, this method may produce a variety of etch morphologies, such as inverted cones and undercut structures.
Reduced Dislocation Density of Non-Polar GaN Grown by Hydride Vapor Phase Epitaxy
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel method for producing low-dislocation density non-polar GaN by hydride vapor phase epitaxy (HVPE). This invention complements the method for producing thick planar films of a-plane GaN by HVPE (UC Case 2003-225) by allowing single-step fabrication of reduced defect density material.
Growth of Planar, Non-Polar, A-Plane GaN by Hydride Vapor Phase Epitaxy
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel method for growing high-quality thick films of a-plane GaN suitable for use as substrates in homoepitaxial device layer regrowth. This invention can be used in conjunction with a method for growing reduced-dislocation density non-polar GaN by hydride vapor phase epitaxy (HVPE) (UC Case 2003-224).
Injection Lasers Fabricated From Semiconducting Polymers
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel method to overcome the difficulties associated with the additional losses caused by the metal electrodes and charge induced absorption. A new architecture, called a light-emitting field effect transistor (LEFET) configuration, combines with injection-induced amplification of the "cut-off mode" to achieve gain narrowing and lasing.
Thermally Re-mendable Cross-linked Polymers
Organization: University of California, Los Angeles (UCLA)
Researchers at UCLA have identified and reduced to practice a method of making thermally re-mendable polymers. These transparent and colorless polymeric solids, which are composed of two components assembled by the well-known Diels-Alder reaction, can be fabricated without the use of solvent and cured at temperatures ranging from 80 C to 120 C. Once a crack is propagated in this cured material, the crack can readily be thermally repaired. Upon heating the polymeric body to 120 C, many bonds within the material break. Upon slow cooling ...
Nonpolar (Al, B, In, Ga)N Quantum Well Design
Organization: University of California, Santa Barbara (UC Santa Barbara)
Scientists at the University of California have developed a novel approach to designing high-performance nonpolar quantum wells. This technique can be used to grow higher-emission structures by increasing the quantum well width.
Giant Planar Hall Effect In Ferromagnetic Semiconductors
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California and the California Institute of Technology have invented (Ga,Mn)As-based ferromagnetic semiconductor materials that exhibit the giant planar Hall effect (GPHE). In GPHE, the localized alignment of electron spins causes a change in resistance. With this invention, the GPHE-induced resistance change in multiterminal, micron-scale structures can be as large as ~100 Ω, about four orders of magnitude higher than the analogous resistances previously observed in metallic ferromagnets. This ...
Method For Making Advanced Thermoelectric Devices
Organization: University of California, Santa Barbara (UC Santa Barbara)
This novel technology from the University of California at Santa Barbara can achieve microchip fabrication of TE devices by enabling precise periodic assembly of thin film semiconductor materials. This novel technique can fabricate TE devices that can achieve the same cooling or power generation capacity in thermopiles with less electron current compared with present bulk materials. Because lesser electron current is required to accomplish the same task, total thermopile semiconductor material cross-sectional area normal to thermal and ...
Novel, Low-Cost Method For Fabrication Of Nanostructured Materials
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UCSB have developed a new synthetic process that creates novel semiconducting, photoconductive, photovoltaic, optoelectronic and battery thin films and materials at low cost. This new process has many distinct advantages over the current state-of-the-art, including: low cost, low energy, room-temperature synthesis; production of high quality single crystal sheets of material with low resistivity and high electrical connectively formed both on and off substrates; and, high flexibility within process to create wide ...
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a surface treatment that can shape the electric field profile in electronic devices in 1, 2, or 3 dimensions.' The ability to locally change the electric field distribution can substantially improve the performance of different kinds of devices, including high electron mobility transistors (HEMTs), light emitting diodes (LEDs), and ultraviolet detectors. In AlGaN/GaN HEMTs, for example, the electric field shaping technology allows a reduction in the peak electric ...
Coupled Mass-Spring Systems And Imaging Methods For Scanning Probe Microscopy
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel scanning probe microscope to dynamically measure material properties of samples, such as surface hardness, by separating the functions of actuation, indentation and sensing into separate dynamic components. By using more than one sensor cantilevers, the desired higher harmonic frequency is mechanically amplified while the actuation signal is suppressed, leading to higher performance and higher versatility over a wide range of different sample materials. ...
Electrically-Pumped Vertical-Cavity Surface-Emitting Laser (VCSEL)
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed electrically pumped (Ga,In,Al)N VCSELs with improved ohmic contact and lateral current distribution and an integrated micromirror fabricated onto the substrate that provides for optical mode control in the active region. A relatively simple process is used to fabricate the VCSEL.
Single Input, Single Output Sensor For Rapid Detection Of Multiple Analytes
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UC Santa Barbara have developed a novel sensor design that couples the inherent benefits of a sensor array with those of a single input, single output (SISO) system. This particular architecture allows for rapid detection and identification of multiple analytes on a single platform in an efficient manner. The invention is simpler to implement than existing sensor arrays, yet maintains similar performance characteristics, it could become the standard for resonant array-based detection.
Portable Device For Dynamic Nuclear Polarization (Dnp)
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a portable device and methodology to achieve significant enhancement of NMR signal under ambient conditions by means of DNP. The fully portable device is also equipped with electron paramagnetic resonance (EPR) detection capability. This device can be easily commercialized to provide DNP-enhanced NMR signal instantaneously using moderate physical conditions, and therefore can be applied directly to biological applications including in vivo MRI of cardiovascular ...
Supramolecular Block Copolymer Compositions For Sub-Micron Lithography
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed an entirely new approach to develop self-assembled nanoscale patterns for use in sub-micron lithography. The invention provides access to the diverse morphologies that ABC triblock copolymers offer, but only requires the synthesis of binary A-B and B'-C block or graft copolymers. These techniques will enable the fabrication of >10'' devices on a chip in a low-cost and multi-functional manner.
Loss Modulated Silicon Evanescent Lasers
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed two novel alternative methods for modulating semiconductor lasers that enable much higher frequency modulation. Rather than modulating the incoming current to the laser, the researchers propose modulating the loss in the cavity. This results in much faster modulation. Alternatively, in a ring laser significant impacts on modulation can be made by adding a second arm. By modulating the phase of light in this section, the light in the ring can add or subtract from the ...
Improved Manufacturing of Semiconductor Lasers
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UCSB have developed a method of fabricating solid state lasers with embedded structures for improved performance via patterning. The patterned layer(s) may be engineered to act as a mirror, optical confinement layer, grating, wavelength selective element, beam shaping element, etc. for the active layers. The key advantage of this improvement is that it places the photonic crystal layer above the active layer for better performance. Conventional approaches place the photonic crystal layer below the active layer.
High Efficiency LED With Emitters Within Structured Materials
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UCSB have developed novel LEDs, where the emission region is structured in order to have efficient light extraction. The structuring is designed for light extraction from thin films, such as photonic crystal acting as a diffraction grating. In addition, the structuring controls in-plane emission and allows new modes into which light will be emitted. By embedding the photonic crystal within the emitting layer, one achieves maximum interaction between the structure guided modes and the crystal, reducing the size of the ...
Preamplifying Cantilever For Contact Resonance Mode Imaging
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have created a novel preamplifying cantilever (PCL) design for scanning probe microscopes (SPM) that is capable of mechanically amplifying specimen movements. Initial tests show an amplitude amplification greater 10 and a high improvement on the signal to noise ratio of the overall measurement. The cantilever design fits seamless into existing scanning probe microscopes and fabrication schemes for cantilevers.
Low Temperature Wafer Bonding For Microwave and Power Electronics
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a new method using low temperature bonding to fabricate optoelectronic and electronic devices which combine the benefits of Si with the III-N material system. In particular, these devices include high-voltage transistors and opto-electronic devices such as solar cells, LEDs and photo-detectors.
Polymer Shutter For Infrared Detection Systems
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed an electrically driven polymer-based shutter for infrared detectors. The invention uses an electrically driven polymer shutter to achieve on and off states and is designed to replace mechanical shutters in current IR detector systems for both calibration and imaging purposes
Hybrid Silicon Integrated Optical Isolator and Circulator
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed the first nonreciprocal ring resonator and implemented it in a ring isolator, which has the main advantages of miniaturization and integration with other optoelectronic devices. The isolator increases stability and reduces noise in optoelectronic circuits due to a high isolation ratio, which is measured at 9 dB in 1550 nm regime. It also has a low insertion loss, making for efficient signal propagation. The ring isolator can potentially be configured as an optical ...
Potential Barriers for Improved Performance in Nitride-Based Electronics
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel method for fabricating potential barriers in N-face nitride-based electronics, applicable in high-performance transistors and other semiconductor devices. These barriers induce an effective energy band discontinuity in order to modify parameters. Possibilities include a reduction in gate leakage, increase in electron confinement, reduction of alloy scattering of channel electrons, and increase in electron mobility by over 20%.
Method for Synthesis of Colloidal Nanoparticles
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a superior method for the synthesis of highly dispersive inorganic nanoparticles with narrow size distribution. Colloidal nanoparticles of this nature are applicable to many semiconductor and biological fields. The limitations of prior methods are overcome by a novel heating process with a high ramping rate resulting in high crystallinity of the nanoparticles. The novel method of synthesis is fit for safe, large-scale, reproducible, and energy efficient production of ...
High Performance Polymeric Material for Holographic Data Storage
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel material applicable to holographic data storage. This technology features low fabrication costs and largely scalable production due to simple manufacturing technique, small size, and a simple design that circumvents the need for a co-sensitizer or binder/polymeric matrix. It is easily processed into different shapes and forms, has no writing-induced shrinkage and a long shelf life. Moreover, this new class of material exhibits large storage capacity, short ...
Zwitterionic Electron Injection Layers for Highly Efficient Polymer LEDs
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel composition for electron injection layers applicable in PLEDs. Electron injection layers of this composition can be deposited via solution methods without disturbing the underlying layer. Due to superior electron injection, PLEDs utilizing this technology are more efficient and perform up to three times better than LEDs with barium/aluminum cathodes.
High Frequency Operational Amplifier
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a high frequency operational amplifier. It exhibits precision gain at high frequencies and has record high bandwidth and linearity at a given operating power. Because it doesn’t require complementary devices, production costs are decreased, and the op-amp tolerates a wide range of external input and output impedances. It is applicable in a wide range of both analog and digital electronics.
Cleaved Facet Edge-Emitting Laser Diodes Grown on Semipolar GaN
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed cleaved facet edge-emitting laser diodes grown on semipolar gallium nitride substrates. Because the devices are grown on a semipolar orientation, they have lower thresholds and higher efficiencies. The efficiency is further increased due to smooth, low loss cavities achieved by cleaved mirror facets. These devices are applicable to high brightness lighting displays, high resolution printers, projection displays, next generation DVD players, medical imaging, and ...
Selective Dry Etching of N-Face (Al, In, Ga)N Heterostructures
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method for selective dry etching of n-face (Al, In, Ga)N heterostructures. It is reproducible and scalable, making it viable for mass production, and it exhibits an extremely high etch selectivity for use on devices requiring fabrication with nano-scale precision of 1 nm ~ 10 nm. In the process, there is minimal damage to the heterostructures, and the resultant etch surface is smooth. It is applicable to LEDs, specifically III-nitride microcavity light emitting diodes ...
High-Efficiency, White, Single, or Multi-Color LED by Photon Recycling
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed an LED design, using a photonic crystal, that can emit white, single, or multi-color light. By utilizing photons that are usually lost internally in the device, efficiency is significantly increased. Moreover, this efficiency benefit is realized while retaining a planar single layer structure, which ensures low-cost fabrication. Since the LED can use different emitters of different colors, it has good color rendering, high quality illumination, and allows for the ...
Mirrorless LED with High Luminous Efficiency
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a light emitting diode (LED) in which the multi directions of light can be extracted from the surfaces of the chip before entering the shaped plastic optical element and subsequently extracted to air. The present invention combines a high-efficiency LED chip with shaped phosphor layers to increase the total luminous efficacy of the device.
Hybrid Inorganic Light-Emitting Devices
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed hybrid inorganic light emitting device/luminescent polymer light-emitting sources for efficient and cost effective white lighting and for full-color applications. This invention utilizes the emission from inorganic light-emitting devices to pump the photoluminescence of organic thin films. This yields a combined emission made up of light emitted from the pump device superimposed on the photoluminescence emission for the organic thin films. The color of the light out can ...
Growth of High-Quality, Thick, Non-Polar M-Plane GaN Films
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel method of growing highly planar, fully transparent and specular m-plane gallium nitride (GaN) films. The method provides for a significant reduction in structural defect densities via a lateral overgrowth technique. As a result of this invention, it is now possible to grow high-quality, thick non-polar m-plane GaN films that may be subsequently used as substrates for the growth of improved electronic and optoelectronic devices by a variety of growth techniques.
Method for Growing High-Quality Group III-Nitride Crystals
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel method for growing group Ill-nitride crystals in supercritical ammonia. The group III-nitride bulk crystal is grown in an autoclave in supercritical ammonia using a source material or nutrient and a seed crystal. The supercritical ammonia provides for high solubility of the source materials and high transport speed of dissolved precursors. This method uses an internal chamber equipped with a pressure releasing device that enables the safe filling of ammonia and ...
Growth of Planar Semi-Polar Gallium Nitride
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a technique for the growth of planar films of semi-polar nitrides, in which a large area of (Al, In, Ga)N is grown parallel to the substrate surface. For example, samples can be grown on 10 mm x 10 mm or 2 inch diameter substrates. The advantage of semi-polar over c-plane nitride films is the reduction in polarization and the associated increase in internal quantum efficiency for certain devices.
Photonic Structures for Efficient Light Extraction and Conversion in Multi-Color LEDs
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed multiple-light source LEDs that provide increased light extraction and conversion efficiencies, as well as increased brightness, while retaining planar structures. The LEDs contain several emitting species, each providing light emission in a range of wavelengths. Photonic crystals, acting as diffraction gratings, ensure efficient light extraction, efficient excitation of the optically-pumped species, and provide a means for modifying the far-field emission pattern for ...
Defect Reduction of Non-Polar and Semi-Polar III-Nitrides
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have successfully developed sidewall lateral epitaxial overgrowth (SLEO) of non-polar a-plane and m-plane GaN. By using single step lateral epitaxial overgrowth, dislocation densities can be reduced and stacking faults are localized only on the nitrogen faces. Dislocation densities can be reduced down to even lower values by eliminating defects not only in the overgrown regions but also in the window regions. Also, by favoring gallium (Ga) face growth and limiting nitrogen (N) face ...
MOCVD Growth of Planar Non-Polar M-Plane Gallium Nitride
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed methods for successfully growingplanar non-polar m-plane gallium nitride (GaN) with metalorganic chemical vapor deposition (MOCVD). These methods takes advantage of non-polar nature of m-plane GaN to eliminate polarization fields, and gives rise to flexibility in growth variables, such as temperature, pressure and precursor flows, utilizing the advantage of m-GaN stability during growth.
Lateral Growth Method for Defect Reduction of Semipolar Nitride Films
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel method for defect reduction via lateral growth of semipolar nitrides. Lateral growth can be used to reduce defect density in semipolar nitride films by such growth techniques as LEO, SLEO, cantilever epitaxy, and nanomasking. The lateral growth can also be performed multiple times to further decrease the dislocation density.
Low Temperature Deposition of Magnesium Doped Nitride Films
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method for growing an improved quality device by depositing a low temperature magnesium doped nitride semiconductor thin film. This process includes using deposition temperature for the magnesium doped GaN film that is lower than the one used for the deposition of the multi quantum well. This results in a significant increase in the output power of a nitride LED.
Growth of Group III-Nitride Crystals using Supercritical Ammonia and Nitrogen
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed an ammonothermal growth method for high-quality group III-nitride bulk crystals at commercially practical growth rates. This process involves increasing the nitrogen pressure in the reaction vessel to avoid disassociation of the ammonia and solves the issues related to state-of-the-art ammonothermal methods.
Growth of Polyhedron-Shaped Gallium Nitride Bulk Crystals
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method to grow polyhedron-shaped GaN bulk crystals, which are not possible using existing growth methods. This shape of GaN crystals has an advantage over the existing platelet-shaped GaN since GaN wafers of any orientation can be obtained simply by slicing the polyhedron.
Fabrication of Optoelectronic Devices with Embedded Void-Gap Structures
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a variety of techniques to improve the performance of LEDs and laser diodes by embedding photonic crystals or voids into the optoelectronic devices. The patterns of the structured layers can be random or periodic and arranged in one, two or three dimensions and are ready for final contacting without the need for further growth.
Small Dimension High-Efficiency High-Speed Vertical-Cavity Surface-Emitting Lasers
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a Vertical-Cavity Surface-Emitting Laser (VCSEL) applicable to optoelectronics, specifically optical interconnects. This device is very efficient due to its small dimension, reduced parasitic capacitance, and reduced optical scattering loss. It can achieve bandwidths of at least 15 GHz, which translates to at least 30 Gbit/s operation.
Long Wavelength, Vertical Cavity Surface Emitting Laser with Vertically Integrated Optical Pump
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a long wavelength VCSEL that is optically pumped by a shorter wavelength VCSEL and is particularly useful for fiber-optic communication systems. As single devices, these long wavelength VCSELs can replace expensive distributed feedback lasers in modest power applications. In arrays, these devices open up the possibility of long distance parallel data transmission, either with a ribbon of optical fiber, or by wavelength-division-multiplexing of several VCSELs onto a ...
Improved Performance Vertical Cavity Surface Emitting Laser
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed improved performance apertures and mirrors to decrease losses and increase functionality in Vertical-Cavity Surface-Emitting Lasers (VCSEL). A novel method of fabrication has also been developed for these apertures and mirrors to increase laser modulation bandwidth. This fabrication process allows for design variation of several important parameters including mirror thickness, taper length, aperture length, taper angle, and aperture opening diameter.
Method for Making a Metal Layer Semiconductor Laser
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel method for making a metal layer semiconductor laser with large bandwidth and the capability for high power output. This semiconductor laser has higher bandwidth and power output capabilities than conventional semiconductor laser devices, giving it improved microwave performance for higher quality telecommunications.
LED Structure with Low Efficiency Droop for High-Current Applications
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel LED structure that shows reduced droop effects when driven with high currents. This structure provides a pathway to nitride-based LEDs free from the droop effect. These LEDs have much lower efficiency droop than other LEDs operating at similar current densities and wavelengths. Low efficiency droop LEDs will remain bright when used in high-current applications such as automotive, lighting and general illumination, reducing the need for large ...
Improved Manufacturing of Solid State Lasers via Patterning of Photonic Crystals
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at UCSB have developed a method of fabricating solid state lasers with embedded structures for improved performance via patterning. The patterned layer(s) may be engineered to act as a mirror, optical confinement layer, grating, wavelength selective element, beam shaping element, etc. for the active layers. The primary advantage of this technology is that it provides for fabrication of all the needed functionality in one lithography step via patterning.
High Efficiency Group-III Nitride/Non-Group-III Nitride Tandem Solar Cells
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method for wafer bonding Group-III nitride cells to non-Group-III nitride cells to create a multi-junction solar cell with improved efficiency. Current tandem solar cells utilize either the Group-III nitride material system or a material system not including Group-III nitrides. This limits how much of the solar spectrum the device can effectively absorb and convert to electricity, thus limiting device efficiency. By combining Group-III nitride cells, which perform ...
Organization: University of California, Santa Barbara (UC Santa Barbara)
This invention describes a scheme for fabricating III-nitride semiconductor structures wherein a highly selective photo-induced etch is achieved through strategic modification of the local electrochemical potential of the semiconductor structure relative to the electrolyte. This is accomplished through: The suitable placement of electrically resistive (unintentionally-doped, doped, alloyed) or electron-blocking layers in the semiconductor structure. The selective placement of the cathode in PEC etching, wherein the ...
Universal Fixture/Package for Spatial-Power-Combined Amplifier
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed improved universal fixture for testing spatial power combined amplifiers in a metallic waveguide, as well as an improved amplifier itself. This apparatus can utilize multiple cards or arrays of solid-state amplifiers such that the cards can be maintained in a spaced apart relationship. The cards remain easily removable so that other cards having different amplification devices or different heat removal structures may be readily used in the apparatus.
Nonlinear Sensors and Antenna Array
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a system that exploits the synchronization properties of coupled, nonlinear oscillators arrays to perform power combining, beam steering, and beam shaping. This architecture utilizes interactions between nonlinear active elements to generate beam patterns. A nonlinear array integrates the signal processing concurrently with the transduction of the signal. This architecture differs fundamentally from passive transducer arrays in three ways: 1) the unit cells are ...
Phosphor-Free White Light Source
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a phosphor-free white light source, where an indium-containing light-emitting layer, as well as subsequent device layers, is deposited on a textured surface. It is possible to develop a device with suitably textured areas that would emit at two or more peak wavelengths, where both peak emission wavelengths are produced primarily from the indium-containing light-emitting layer.
Method for Wafer Bonding for Optoelectronic Applications
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a method of producing a fused or bonded structure between nitrogen and zinc. Fabricating highly reflective and conductive DBR structures using nitride materials, especially p-type conductive DBR fabrication, is difficult. Using wafer bonding (fusion) techniques, a high-quality DBR structure, with a reflectivity of more than 99%, can be set into the GaN-based optical device structure. By increasing reflectivity, thus enhancing light extraction, subsequent device ...
Single or Multi-Color High Efficiency LED by Growth Over a Patterned Substrate
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed new LED structures that provide increased light extraction efficiency while retaining a planar structure. The planar structure makes the new LED structures easy to manufacture and at low cost.
High Efficiency LED with Optimized Photonic Crystal Extractor
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed new LED structures that provide increased light extraction efficiency while retaining a planar structure. The new LED structures provide direct emissions outside the structure and, in addition, convert guided light into extracted light using a diffraction grating. This grating may be placed outside the current-injected region of the active layer, or current may be injected into the grating region. Moreover, the diffraction grating is comprised of an array of holes, ...
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a bipolar transistor through a mechanism based on spin polarization. Bipolar transistors with a ferromagnetic base of the present invention can potentially generate almost 100% spin-polarized current injection into nonmagnetic semiconductors. Optical control of ferromagnetism and spin splitting in the base can lead to either long-lived or ultrafast switching behavior. Fringe field control of the base magnetization can be used for information transfer between metallic ...
Wafer Bonding For Highly Efficient Nitride-Based LEDs
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a III-nitride optoelectronic device that includes an n-type III-nitride, an active region, and p-type III-nitride. One or more transparent conductor layers wafer bonded to one or more sides of the III-nitride optical device, where the light passes through the transparent conductor layers, the transparent conductor layers reduce light absorption inside the III-nitride because they are transparent, and the transparent conductor layers enable uniform light emitting from ...
Packaging Technique for the Fabrication of Polarized Light Emitting Diodes
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a polarized LED and a method of fabricating and packaging the device. The LED may be attached in a favorable orientation with respect to a package, so that the light polarization direction of emitted light from the package is apparent. The package may include at least one additional marker indicating the light polarization direction. Regardless, if a LCD is large (as for a television screen) or small (as for a cell phone screen), multiple LEDs are used to obtain ...
Organization: University of California, San Diego (UC San Diego)
A new acoustic technique for providing real-time visual images of the interior of the ocean has been invented by a researcher at Scripps Institution for Oceanography. The imaging process relies on ambient noise, or "acoustic daylight," as the source of illumination with the underlying idea being analogous to photography in the atmosphere with daylight illuminating the subject. An object in the noise field scatters the incident sound and the scattered field is focused with an acoustic lens to form an image on an array of transducers. After ...
LED Device Structures with Minimized Light Re-Absorption
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a III-nitride light emitting diode (LED), in which light can be extracted from two surfaces of the LED before entering a shaped optical element and subsequently being extracted to air. This technology minimizes the light re-absorption at the LED active region by eliminating light reflection at the p-type side surface of the LED chip.
High Efficiency and High Brightness LEDs for Various Lighting Applications
Organization: University of California, Santa Barbara (UC Santa Barbara)
Researchers at the University of California, Santa Barbara have developed a novel approach for producing a GaN-based semi-polar-oriented light emitting diode (LED) that contains a thin p-type GaN layer and no AlGaN electron-blocking layer (EBL). This technology offers several advantages over the existing semi-polar LEDs. First of all, the thin p-type GaN layer and AlGaN EBL free designs can lower series-resistance and thus the operating voltage of a GaN-based LED. Additionally, the thin p-type GaN layer may reduce the absorption of light ...
A Radiotherapy System for Better Radiation Dosimetry
Organization: University of California, Los Angeles (UCLA)
Researchers in the laboratory of Professor Ke Sheng of UCLA’s Department of Radiation Oncology have developed a new approach to model and optimize non-coplanar radiation therapy. The system incorporates technology that captures digitized images of patient surfaces and the treatment apparatus to create a design model for therapy pre-planning. The system further calculates the optimal beam angles for therapy and the couch and gantry configurations that would minimize distances between the radiation source and the ...
Sted Microscope With A Large Field Of View
Organization: University of California, Los Angeles (UCLA)
Professor Enrico Stefani and colleagues at the David Geffen School of Medicine at UCLA have developed a STED system that allows a large area of interest in a biological sample to be imaged multiple times at super resolution. By incorporating a resonant scanning mirror, the exposure time needed is greatly shortened, enabling fluorophores to relax during the excitation interval and curbing the photobleaching effect. Moreover, the system has been designed to image large areas (40μm x 40μm) at a small pixel size (10nm), thereby ...
Optical Seismometer and Tiltmeter with Monolithic Flexures
Organization: University of California, San Diego (UC San Diego)
A Michelson interferometer is formed by discrete optical elements mounted to a frame that holds a pendulum suspended from a monolithic flexure. The interferometer measures the displacement of the end of the pendulum with respect to the frame. Optical fibers link the optics to a laser, photodetectors, and a digitizer for signal processing at the other end of an optical fiber cable. The system is robust and ideal for oil and gas borehole sensing, as only optical components are exposed to the harsh working environment with all ...
Organization: University of California, San Diego (UC San Diego)
Invention is a non-invasive wearable tactile stimulation device (WTSD) for precise tactile stimulation on the body surface. Tubes and nozzles are embedded in clothing (e.g. mask, suit, gloves, and sandals), which allows computer controlled air flow to be delivered to a large number of locations on a small region of skin (i.e. high-density array) or to a widespread range on the full-body surface (from head to toes). Complex spatial-temporal patterns of tactile stimulation across the body can easily be generated by computer programs, and ...
Energy Efficient Wireless Neural Interfaces
Organization: University of California, San Diego (UC San Diego)
Proposed is a highly efficient and simple compact circuit design to effect wireless power induction in neural interfacing medical prosthesis. This work presents a simplified architecture for wireless neural stimulators that relies on a few circuit components including an inductor, capacitor and a diode to elicit an action potential in neurons. The feasibility of the design is supported with analytical models of the inductive link, electrode, electrolyte, membrane and channels of neurons. Finally, a flexible implantable prototype of the design ...
Advanced Linear-equation Solver for Fluid Mechanics and Fluids/Structure Interaction Modeling
Organization: University of California, San Diego (UC San Diego)
This solver is appropriate for the use in general purpose finite element computational fluid dynamics (CFD) and fluid structure interaction (FSI) solvers. This library also covers two other standard linear solvers, i.e. Generalized Minimum Residual (GMRES) for non-symmetric systems and Conjugate Gradient (CG) for symmetric systems of equations.
Word-Spotting in Unconstrained Camera Images: Control-F for the Real World
Organization: University of California, San Diego (UC San Diego)
An improved OCR engine for real-world text reading using a mobile phone or other hand-held mobile device. The copyrighted software can capture words from street signs, grocery store placards, and a host of other non-standard print references and quickly interpret them with its built-in reference dictionary. The conversion to actionable information is fast and the application thin, enabling easy adoption in a mobile setting.
Thresholdless Nanoscale Coaxial Lasers
Organization: University of California, San Diego (UC San Diego)
Researchers from UC San Diego have developed a new resonator design that leverages the unique properties of nanoscale coaxial structures for harnessing electrodynamical effects at sub-wavelengths, thus permitting the size of the laser cavity to be scaled down without increasing the threshold power required to drive lasing. This invention is the first demonstration of lasing in metal based nanoscale coaxial cavities and the smallest telecom nanolaser to date operable in the continuous wave regime at room temperature. Furthermore, this ...
Differential Dynamic Element Matching Analog-To-Digital Converter
Organization: University of California, San Diego (UC San Diego)
Products: High resolution data converters optimized for use in single-poly CMOS integrated circuits. Technology: A 3.3V .5µ single-poly CMOS audio ADC Delta-Sigma modulator with 98dB Peak SINAD is realized which overcomes the inherent limitations placed on analog devices when incorporated in optimized digital environments. This invention provides improvements to conventional flash analog-to-digital converters (ADCs) as used in a variety of applications, including internal components within delta-sigma modulator circuits for ...
Method And Product For Particle Mounting
Organization: University of California, San Diego (UC San Diego)
As part of the Tacky Dot® donation, the University is offering for commercialization the process and product of mounting free-flowing particles having a support surface with an array of tacky areas which have a size and bonding strength suitable for the adhesion of either one or two particles (see patent 5,356,751). The size of the particles can be between ...
CaveCAD - A 3D Modeling Software Tool for Immersive Virtual Reality Environments
Organization: University of California, San Diego (UC San Diego)
This new invention is a novel set of computer aided design tools for use in the immersive virtual reality space. Initially developed to enable architects and designers to model and experience new projects before they are built, this system is equally adaptable to any training or simulation setting. Users may experience and respond to environments and situations of interest without first building expensive, impractical or dangerous real-world physical spaces. One could easily imagine mapping out a confined space; such as a ship's engine room ...
Organization: University of California, San Diego (UC San Diego)
Engineers from UC San Diego have patented novel transistor designs having a substrate, a structure supported by the substrate including a source, drain, gate, and channel, wherein the source and the channel are made of different materials, and a tunnel junction formed between the source and the channel, whereby the tunnel junction is configured for injecting carriers from the source to the channel. The materials used in the source and the channel are different, and are chosen in order to optimize the tunneling current.
Ligands for Catalyzing Chemical Reactions
Organization: University of Florida
Optoelectronic Materials: Facile Method Enables Exploration of New Organic-Soluble Graphene
Organization: PARTEQ Innovations, Queen's University
Technology Description: An exciting method has been discovered that enables facile synthesis of novel azaborine (i.e., nitrogen and boron containing) compounds. These new compounds include polycyclic aromatic molecules (e.g., graphene-like novel compounds) wherein a number of benzene rings have been replaced by six-membered rings in which a boron-nitrogen group takes the place of a carbon-carbon group. This replacement provides a family of compounds that solve the problem of graphene’s insolubility in organic solvents. ...
