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Browse Category: Materials & Chemicals > Thin Films

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2D Perovskite Stabilized Phase-Pure Formamidinium Perovskite Solar Cells and Light Emitting Diodes

UCLA researchers in the Department of Materials Science and Engineering have developed a novel lead halide perovskite solar cell based on a mixture of formamidinium perovskites and 2D perovskites.

Material For Thermal Regulation

Researchers at UCI have developed a lightweight, flexible thermal material that, due to the extent that it is stretched, allows for tunable control of heat flow.

Microporous membranes for the separation of enantiomers

Current methods used to separate racemic compounds on a large scale have limitations in cost, energy efficiency, and discontinuous processing. UCI researchers have synthesized a membrane made of chiral porous polymers that can separate enantiomers from racemic mixtures through continuous processing.

High Speed Indium Gallium Nitride Multi-Quantum Well (InGaN MQW) Photodetector

A way to increase the bandwidth of InGaN MQW photodetectors to make them compatible with high-speed VLC links.

Fabrication of Relaxed Semiconductor Films without Crystal Defects

A technique for making relaxed InGaN layers without crystal defects.

Multiple-absorbers offer increased solar conversion efficiencies for artificial photosynthesis

   Researchers at UCI have, for the first time, developed a method for modeling the efficiencies of artificial photosynthetic devices containing multiple light absorbers. As these devices more closely parallel naturally occurring photosynthesis, they offer higher performance than standard single-absorber devices.

Controlling Magnetization Using Patterned Electrodes on Piezoelectrics

UCLA researchers in the Department of Materials Science and Engineering have developed a novel piezoelectric thin film that can control magnetic properties of individual magnetic islands.

Hydrogel Thin Film-Based Dynamic Structural Color System for Sensing, Camouflage, and Adaptive Optics

UCLA researchers from the Department of Material Science and Engineering have developed a novel hydrogel color system that can be used for dynamic sensing, camouflage, and adaptive optics.

Robust, Ultra-Flexible, Micro-Encoded Ferromagnetic Tape for Bioseparation and Assembly

Researchers at the UCLA Department of Bioengineering have developed methods to embed electroplated magnetic materials within elastomeric materials and use these flexible magnetic hybrid materials for biological applications.

Highly Efficient Perovskite/Cu(In, Ga)Se2 Tandem Solar Cell

UCLA researchers in the Department of Materials Science and Engineering have developed Perovskite/Cu(In, Ga)Se2 (PVSK/CIGS) tandem photovoltaic devices with ~22% efficiency.

A General Solution-Processable Approach To High-Quality Two-Dimensional Ink Materials For Printable High-Performance Large-Area And Low-Cost Electronics/Optoelectronics/Thermoelectrics

UCLA researchers in the Departments of Chemistry & Biochemistry and Materials Science & Engineering have developed a general and cost-effective solution-phase approach to create large-area and high-performance thin films or devices.

Refreshable Tactile Display Using Bistable Electroactive Polymer

Researchers in the UCLA Department of Materials Science and Engineering have developed a high resolution, refreshable, and low-cost pneumatic tactile interactive device with a compact structure, single fluidic reservoir, and high actuator density that exerts large stroke and provides high blocking force.

Controlled Homo-Epitaxial Growth Of Hybrid Halide Crystals

Organic-inorganic hybrid perovskites have demonstrated tremendous potential for next-generation electronic and optoelectronic devices due to their remarkable carrier dynamics. However, current studies of electronic and optoelectronic devices have been focused on polycrystalline materials, due to the challenges in synthesizing device compatible high quality single crystalline materials.

Photo-induced Metal Printing Technique for Creating Metal Patterns and Structures Under Room Temperature

UCLA researchers in the Department of Materials Science and Engineering have developed a low-temperature metal patterning technique.

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.

An Implantable Electrocorticogram (ECoG)-Brain-Computer Interface System for Restoring Lower Extremity Movement and Sensation

A fully implantable brain-computer interface (BCI) with onboard processing to control a robotic gait exoskeleton as a walking aid for individuals with chronic spinal cord injury (SCI). This technology would alleviate SCI patient’s dependence on wheel chairs, reducing the risk of secondary medical complications that account for an estimated $50 billion/year in healthcare costs.

Zero-power microfluidic osmotic pumps using ultra-thin PDMS membranes

Researchers at UCI have developed a zero-energy, inexpensive micropump that uses osmotic pressure alone to draw fluid through a microfluidic device.

Graphene-Polymer Nanocomposite Incorporating Chemically Doped Graphene-Polymer Heterostructure for Flexible and Transparent Conductive Films

UCLA researchers in the Department of Electrical Engineering have invented a novel graphene-polymer nanocomposite material for flexible transparent conductive electrode (TCE) applications.

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.

Selective Chemical Bath Deposition of IrOx on Thin Film Structure

UCLA researchers in the Department of Bioengineering have developed a selective chemical bath deposition method to create IrOx thin films.

Respiratory Monitor For Asthma And Other Pulmonary Conditions

A patch sensor that is able to continuously monitor breathing rate and volume to diagnose pulmonary function and possibly predict and possibly prevent fatal asthma attacks.

Scalable Manufacturing Of Superhydrophobic Structures In Plastics

Superhydrophobic surfaces that repel liquid have found a multitude of applications due to their self-cleaning and antibacterial effects, but are often highly surface selective and difficult to produce. Researchers at UCI have developed a new method to reliably mass produce universal superhydrophobic surfaces in a simpler and more cost effective manner.

Novel Anti-Bacterial, Anti-Fungal Nanopillared Surface

Medical devices are susceptible to contamination by harmful microbes, such as bacteria and fungi, which form biofilms on device surfaces. These biofilms are often resistant to antibiotics and other current treatments, resulting in over 2 million people per year suffering from diseases related to these contaminating microbes. Death rates for many of these diseases are high, often exceeding 50%. Researchers at UCI have developed a novel anti-bacterial and anti-fungal biocomposite that incorporates a nanopillared surface structure that can be applied as a coating to medical devices.

Selective Transfer Of A Thin Pattern From Layered Material Using A Patterned Handle

Normal 0 false false false EN-US JA X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman",serif; mso-fareast-language:JA;} Van der Waals crystals are a class of materials composed of stacked layers. Individual layers are single- or few-atoms thick and exhibit unique mechanical, electrical, and optical properties, and are thus expected to see widespread adoption in devices across a range of fields such as optical, electronic, sensing, and biomedical devices.  Graphene and transition metal dichalcogenides offer desirable properties as few-layer or monolayer film. Accessing the monolayer form in a repeatable fashion, as part of a predictable and high-yield manufacturing process is critical to realizing the many potential applications of two-dimensional materials at scale. In order to fabricate devices made from few- or monolayer materials, layer(s) of material of specified size and shape, arranged in a pre-determined pattern, must be deposited on a desired substrate and conventional transfer methods include pressure-sensitive adhesives and other viscoelastic polymers and require applied pressure to adhere to their target which can cause out-of-plane deformations and problems with isolating and transferring the patterned few- or monolayer material. Deep etching has similar drawbacks.   UC Berkeley researchers have discovered methods and compositions that enable the transfer medium to adhere strictly to patterned regions, allowing the transfer to remove only patterned material and leave behind unpatterned bulk. This method involves the creation of an intermediate layer between the source material and the transfer medium. Because this layer must strictly cover patterned material, it serves as an etch mask for isolating few-layer material in the desired pattern. Any material which is microns-thick, patternable at the desired lateral pattern scale (likely micron-scale), and subsequently removable would make a suitable intermediate layer. 

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