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A Bi-Functional Lewis Base Additive For Microscopic Homogeneity In Perovskite Solar Cells

UCLA researchers in the department of Materials Science & Engineering have discovered a novel Lewis base additive that decreases heterogeneity in perovskite thin films.

New Non-Platinum Fuel Cell Catalyst

The Kisailus research group at the University of California, Riverside, has  developed a novel fuel cell catalyst made of porous carbon nanofibers doped with inexpensive metal or metal oxide nanoparticles that provide active sites for energy conversion and storage. The active or catalytic nanoparticles are embedded and integrated with graphitic nanofibers and are accessible to the surrounding environment due to high porosity. The extensive graphitic networks within these nanofibers also exhibits enhanced conductivity. Cobalt oxide- graphite composite nanofibers showed equivalent catalytic activity to fuel cell platinum catalysts like platinum on carbon (Pt/C). When operated under fuel cell conditions, the nanofiber formulation provides enhanced durability.  Fig. 1 Metal oxide-graphite composite and porous nanofibers with highly controllable diameter, particle size and performance. Fig. 2 Linear sweep voltametry curves shows that the graphitic nanofibers doped with metal ions have higher current densities than commercial platinum on carbon (Pt/C).  

Non-Mechanical Multi-Wavelength Integrated Photonic Beam Steering Device

Today, projecting optical energy is performed using high power laser sources coupled to free-space optical systems comprised of mechanical components, moving parts, and bulk optics. Unfortunately, the application range of these legacy systems is limited by their size, weight, reliability and cost. Consequently, a substantial research effort has been directed toward the miniaturization and simplification of these systems. Recent work has focused on beam steering using phased arrays. Although optical phased arrays are an elegant non-mechanical beam steering approach, the technical and environmental challenges compared to RF systems (10,000 times smaller wavelengths and tolerances) are daunting. Multi-octave operation across the UV to LWIR regions with acceptable losses poses additional technical challenge for any optical phased array beam steering approach. For these reasons, a need exists for a non-mechanical beam steering approach that lends itself to miniaturization as well as high power ultra-wideband operation.

Hybrid Electromechanical Metamaterials for Optical and Electrical Devices

Researchers at the University of California, Davis have developed a hybrid electromechanical metamaterial for use in high frequency applications for optical and electrical devices.

High Stability PtNiX-M Electrochemical Catalyst

UCLA researchers in the Department of Material Science and Engineering have invented a novel and highly stable platinum-based catalyst material for fuel cell technologies.

Blade Coating On Nanogrooved Substrates Yielding Aligned Thin Films Of High Mobility Semiconductin Polymers

An alternative method of alignment specifically developed for field-effect transistors of organic electronics.

Wafer Scale Growth Of Large Arrays Of Perovskite Micro-Plate Crystals For Functional Electronics And Optoelectronics

UCLA researchers in the Department of Chemistry and Biochemistry and the Department of Materials Science and Engineering have developed a method to grow patterned perovskite micro-plate crystal arrays for functional electronic and optoelectronic applications.

Gold Catalyzed Hydroamination of Alkynes and Allenes

Researchers at the University of California, Riverside have developed a gold complex that functions as the catalyst used in hydroamination of alkynes and allenes. The catalyst has many forms, such as gold nanoparticles/clusters and gold compounds combined with the salts of other metals. Typically, the catalyst has the following structure: L1 – Au+ - L2. L1 and L2 are unique ligands. The catalyst is robust enough to allow hydroamination at a wide range of temperatures (0˚C - 300˚C). Depending on the starting material/catalyst used, 100% hydroamination is achieved in 6 to 24 hours. Fig. 1 One of the catalytic gold complex catalysts used for hydroamination. Note the presence of the ammonia (NH3) as one of the two ligands. Fig. 2 Examples of catalytic amination of various alkynes with ammonia. The last four compounds are dialkynes, which contain multiple carbon-carbon double bonds. Hydroamination of these compounds leads to the formation of heterocyclic rings.  

Boron Phosphide and Its Material Systems for Thermal Management and Thermal Device Applications

UCLA researchers in the Department of Mechanical and Aerospace engineering have developed a novel thermal management material, boron phosphide (BP), that is highly thermally conductive and inexpensive to manufacture, with many desirable properties to integrate with existing electronics and photonics devices.

Ultra-Durable Concrete with Self-Sensing Properties

Concrete is a major material component for transportation, energy, water, and building infrastructure systems. UCI researchers have developed a new class of concrete materials with extraordinarily high damage tolerance and improved properties for long-term health monitoring.

Plasmonic Nanoparticle Embedded PDMS Micropillar Array and Fabrication Approaches for Large Area Cell Force Sensing

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel cell force sensor platform with high accuracy over large areas.

Electrical Conduction In A Cephalopod Structural Protein

Fabricating materials from naturally occurring proteins that are inherently biocompatible enables the resulting material to be easily integrated with many downstream applications, ranging from batteries to transistors. In addition, protein-based materials are also advantageous because they can be physically tuned and specifically functionalized. Inventors have developed protein-based material from structural proteins such as reflectins found in cephalopods, a molluscan class that includes cuttlefish, squid, and octopus. In a space dominated by artificial, man-made proton-conducting materials, this material is derived from naturally occurring proteins.

Magneto-Optic Nanocrystalline Oxides Fabrication

Researchers at the University of California, Riverside developed a fabrication technique that is capable of manufacturing highly transparent Magneto-optic oxides with reduced processing times. Their technique employs CAPAD (current activated, pressure assisted densification). Briefly, rare earth material in powder form is exposed to a specific current, which heats the sample (below melting temp). Pressure is then applied to the powder, compressing it into the desired shape. The processing temperature is optimized in order to achieve sufficient density without causing excessive phase changes that would destroy light transparency. This process produces materials quickly (<20 min), which, combined with high magneto-optical properties, promises less expensive, smaller, more portable magneto-optical devices. Fig. 1 Top image is a schematic cross-section of the CAPAD apparatus. The bottom image displays a Dy2O3 (dysprosium oxide) sample processed using this method. The sample is suspended from a magnet. Lasers of various wavelengths still transmit through the sample This indicates that the desired magnetic/optical properties of the material have been preserved. Fig. 2 Graph of measured average grain size and density of Dy2O3 samples versus processing temperature. The graph shows that an ideal processing temperature is 1100˚C, providing the highest packing density and smallest grain sizes.    

Organic Light Emitting Diodes

Brief description not available

A Highly Error-Prone Orthogonal Replication System For Targeted Continuous Evolution In Vivo

Inventors at UC Irvine have engineered an orthogonal DNA replication system capable of rapid, accelerated continuous evolution. This system enables the directed evolution of specific biomolecules towards user-defined functions and is applicable to problems of protein, enzyme, and metabolic pathway engineering.

Composite Foam

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel composite foam for impact applications.

Clay Activation Of Pd(Ii) And Ni(Ii) Complexes For Ethylene Homopolymerization And Copolymerization With Methyl Acrylate

A clay-supported complex that includes a metal complex containing a phosphinobenzenesulfonate ligand coordinated to Pd(II) or Ni(II), and a clay combined with the metal complex.

Bioorthogonally-Engineered Extracellular Vesicles for Applications in Detection and Therapeutic Delivery

Extracellular vesicles (EVs) are promising as drug delivery carriers because they are inherently biocompatible, It would be desirable to efficiently, specifically, and rapidly change the EVs surface presentation to program the interactions with its target cells. Inventors at UC Irvine have developed a strategy for functionalizing the cellular membranes of EVs with precision and ease.

Synthesis Of Graphene Nanoribbons From Monomeric Molecular Precursors Bearing Reactive Alkyne Units

Researchers in the Department of Chemistry and Biochemistry have developed a novel graphene nanoribbon synthesis, which have numerous applications in electronic devices.

High Performance Encapsulants with Tunable Elastic Properties

Researchers at the University of California, Santa Barbara have discovered a process of creating high performance encapsulants with tunable elastic properties. This entirely new approach improves the mechanical properties of encapsulants for LED devices.

Compact Voltage Sensor For Power-Lines

Power-lines for the distribution and transmission of high-voltage electricity are ubiquitous infrastructure of modern societies. Convenient means exists for measuring the currents in these power-lines. However measuring the voltages between conductors of power-lines is difficult and costly because it typically requires large and expensive equipment due to the high voltages (which can be tens or hundreds of thousands of volts). To address that situation, researchers at UC Berkeley have developed a novel, practical and inexpensive way to measure the conduct-to-conductor voltages of power-lines using components in just one conductor of overhead distribution and transmission power-lines. In addition to voltage, this technology can be augmented to measure current, power, and power flow directions. This Berkeley technology can also applied to power-lines in office buildings, factories and power substations.

Computed Axial Lithography (CAL) For 3D Additive Manufacturing

Additive manufacturing fabrication methods are proliferating rapidly, with photopolymer-based approaches comprising some of the most prominent methods. These stereolithographic techniques provide a useful balance of resolution, build speed, process control, and capital cost (system metrics that typically must be traded off one against another). Resolving the speed limitations, surface roughness (stair-step artifacts), and requirements for support structures would provide the next major steps forward in the progress of these technologies.To address this potential, researchers at UC Berkeley have developed a system and method that accomplishes volumetric fabrication by applying computed tomography techniques in reverse, fabricating structures by exposing a photopolymer resin volume from multiple angles, updating the light field at each angle. The necessary light fields are spatially and/or temporally multiplexed, such that their summed energy dose in a target resin volume crosslinks the resin into a user-defined geometry. These light-fields may be static or dynamic and may be generated by a spatial light modulator that controls either the phase or the amplitude of a light field (or both) to provide the necessary intensity distribution.

Simple Method For Dc Capillary Electrophoresis

Researchers at the University of California, Santa Barbara have developed a microchannel geometry that observes and measures the motion of charged particles that enable one to perform simple DC electrophoresis to measure the electrophoretic mobility of analytes and particles.

A Novel Method to Prevent Postsurgical Cardiac Adhesions Using Oxime Crosslinked Hydrogels

An adhesion is a band of scar tissue that binds two parts of tissue that are not normally joined together. Adhesions may appear as thin sheets of tissue similar to plastic wrap or as thick fibrous bands. The tissue develops when the body's repair mechanisms respond to any tissue disturbance, such as surgery, infection, trauma, or radiation. Although adhesions can occur anywhere, the most common locations are within the stomach, the pelvis, and the heart Two main approaches exist for reducing or attempting to prevent cardiac adhesions: pharmacological therapy and physical barriers. Drugs that prevent or reverse adhesion processes disrupt biochemical pathways of inflammation and fibrin deposition. Unfortunately, these processes are also vital for wound healing. Achieving adequate drug concentration at the site of action, especially for ischemic tissues, is also challenging. A more viable approach is the use of a physical barrier after surgery to prevent fusion of the heart to surrounding tissues. The barriers can be either preformed membranes or injectable hydrogels (fast gelling liquids). Preformed anti-adhesive materials need to be cut before application to the tissue, and must be sutured into place to prevent slippage. While a variety of different materials have been investigated in animals and humans, no materials, to date, have been capable of preventing adhesion formation post-cardiac surgery.

Internal Heating for Ammonothermal Growth of Group-III Nitride Crystals

A new process for heating vessels used in the ammonothermal growth of group-III nitrides.

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