Materials & Coatings

Briefs : Materials
Conformal Metasurface Coating Eliminates Crosstalk and Shrinks Waveguides

Researchers have developed a method to simultaneously control diverse optical properties of dielectric waveguides by using a two-layer coating, each layer with a...

Briefs : Materials
Technique Creates Adaptive Materials

A technique that enables on-demand control of composite behavior could enable a variety of new capabilities for future rotorcraft design, performance, and maintenance. The focus of the research was on...

Briefs : Materials
Engineering Soft Materials that Mimic Neural Tissue

A process for engineering next-generation soft materials with embedded chemical networks that mimic the behavior of neural tissue lays the foundation for soft active matter with highly...

Briefs : Materials
Generating Light-Induced Electrical Current in Atomically Thin Nanomaterials

When hit with light, semiconductors (materials that have an electrical resistance in between that of metals and insulators) generate an electric current....

Briefs : Materials
Metamaterial Device Controls Transmission and Reflection of Acoustic Waves

A thin material was developed that can control the redirection and reflection of sound waves with almost perfect efficiency. While many theoretical approaches to...

Briefs : Mechanical & Fluid Systems
Nano/Micro Mechanical Environmental Test Cell

A device and method have been developed to conduct compression and tensile tests on soft materials such as flocculated sediments, biopolymers, biological materials, and food stuffs. The device...

Briefs : Mechanical & Fluid Systems
Microtesting Rig

The measurement of mechanical behavior in very small samples whose dimensions are on the order of microns and below can offer advantages over conventional macroscopic testing in many instances. Motivations for investigating...

Briefs : Mechanical & Fluid Systems
High-Kinetic-Energy Penetrator Shielding and High-Wear-Resistance Materials Fabricated with Boron Nitride Nanotubes and BNNT Polymer Composites

In recent years, anti-penetration materials have been more widely used for armor, bulletproof vests, and micrometeoroid and orbital debris protection layers for space-suits, space vehicles, and...

Briefs : Electronics & Computers
Catalytic Mechanism Converts CO2 to Methanol

Capturing carbon dioxide (CO2) and converting it to useful chemicals such as methanol could reduce both pollution and U.S. dependence on petroleum products. Catalysts are used to bring...

Briefs : Materials
Coatings Make Natural Fabrics Waterproof

Fabrics that resist water are essential for everything from rainwear to military tents, but conventional water-repellent coatings have been shown to persist in the environment and accumulate in our...

Briefs : Propulsion
Non-Toxic HAN Monopropellant Propulsion

A highly miniaturized, MR-143, green monopropellant thruster was developed for 1N thrust. Testing indicated the initial catalyst bed heater was insufficient. In subsequent development, the thruster was equipped with a more efficient catalyst bed heater. For reliable ignition of the advanced, non-toxic,...

Briefs : Materials
Melt-Cast Explosive Material

The Environmental Protection Agency has listed trinitrotoluene (TNT) as a possible carcinogen, and exposure to the material has been linked to disorders of the blood, such as anemia, and abnormal liver function,...

Briefs : Electronics & Computers
Flexible, Compliant, Multiline Microprobes for Measuring Material Electrical Properties

The ability to measure the electronic conductivity of battery film coatings is a pressing need in the battery industry; however, these measurements can...

Briefs : Electronics & Computers
Faster, More Efficient Information Processing

For decades, computer chips have been shrinking thanks to a steady stream of technological improvements in processing density. Experts have, however, been warning that we'll soon reach the end of the trend known as Moore's Law, in which the number of transistors per square inch on integrated circuits...

Briefs : Materials
Controlled Manufacture of Porous Silicon Carbide

Extremely fine porous structures with tiny holes — resembling a kind of sponge at the nano level — can be generated in semiconductors. A method was developed for the controlled manufacture...