Tech Exchange

Printable Biosensor for On-Site, Online Measurements

Bioactive Hybrid Materials for Photonic Microsystems It allows samples to be analyzed on site within a few minutes by integrating biotechnology, information technology, electronics, physics, and chemistry to realize small and cost-effective bio-photonic microsystems.

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High Performance Single Crystal Piezoelectrics

The new single crystals offered here possess exceptional properties and are poised to revolutionize piezoelectric materials applications. In addition to strain levels exceeding 1% (usable strain: 0.5% at 35 kV/cm), these crystals exhibit five times the strain energy density of conventional piezoceramics. Thus, unlike piezoceramic actuators that employ strain magnification schemes, single crystal actuators can deliver higher strain levels without sacrificing generative force. The high electromechanical coupling of the proposed crystals (>90%) increases transducer bandwidth, resulting in greater sensitivity and acoustic power. In addition, low strain hysteresis results in improved high power efficiency, and lower acoustic impedance than piezoceramics allowing for easier matching to air or water. High coupling also leads to dramatic improvement in passive vibration damping.

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Novel Nano-Structured Concept for Thermal Protection System

Lightweight carbon-carbon (C/C) composites produced by pressure-assisted co- polymerization of carbon fibers, hydrocarbons and fullerenes have excellent mechanical properties and high thermal stability that make them ideal for thermal protection applications.

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Mathematically Lossless Compression for Real-Time Medical Imaging

Qbit’s proprietary line of data compression software offers 100% mathematically lossless data reconstruction that ensures that every bit is reconstructed. It allows for an increase in digital throughput, workflow speed, and acts as an enabling technology for applications that require real-time digital content delivery, such as enabling real-time content delivery between a medical image acquisition system such as a 64-slice CT and the workstation system. The small software “footprint” of the Qbit codec also makes it suitable for use in memory-limited devices as well as chipembedded applications. It can natively handle any raster size, unlimited color planes, and floating-point formats. It is parallelized, so it may perform better than real-time if required. Get the complete report on this technology at: www.techbriefs.com/techsearch/tow/200708a.html Email: nasatech@yet2.com Phone: 781-972-0600

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Automated, In-Process Method for Surface Contamination Inspection of Panels

This patented surface contamination detection system enables accurate, automated, in-line inspection of metallic and composite panels prior to bonding, coating, painting, or welding operations. This technology is currently used for realtime, in-process panel inspection at a leading U.S. aircraft manufacturer, where detecting surface contamination before subsequent operations has resulted in lower scrap and rework cost, and improved customer satisfaction. The technology is transferable to any applications where surface contamination of metal or composite panels is undesirable, necessitating the need for in-process inspection. This method and apparatus incorporates infrared imaging technology and automated multiple cameras to enable accurate, reliable, and automated detection of contaminants on metallic and composite panels. This technology makes surface inspection feasible for high-throughput processing lines. Get the complete report on this technology at: www.techbriefs.com/techsearch/tow/200708b.html Email: nasatech@yet2.com Phone: 781-972-0600

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Reusable, Dry Adhesive Material Utilizing Vertically Aligned Multiwalled Carbon Nanotube Array

A novel dry adhesive is being developed that can mimic the hairs on a gecko's foot using vertically aligned multiwalled carbon nanotube (CNT) array. The use of CNT array as dry adhesive material allows reproducing biological adhesion structures and generates fairly strong adhesion strength (over 100 N per centimeter square). CNTs are known to have extraordinary mechanical, thermal and electrical properties. This adhesive can be bent repeatedly with large deflection without failure, which intrinsically results in a reusable or re-attachable dry adhesive. The highly hydrophobic property of CNTs makes them free from the clumping problem, which the polymer based synthetic hair structures face. This product's adhesion is so effective it can be directly applied to glass.

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Reusable Adhesive Thermal Interface Material (TIM) To Improve the Contact Thermal Conductance

Current TIM technologies include thermal greases or pastes, phase change materials, solders and thermally conductive adhesive tapes. The thermal conductivity of the best thermal greases available in the market are on the order of 10^5 W/m^2 -K. However, thermal greases, which are single use applications, are oily so their utilization is messy, making them difficult to apply in a thin, uniform coat. This reusable technology employs vertically aligned carbon nanotubes (CNTs) to bridge the interfaces. By using a CNT array as dry interface material, his technology can perform as a thermally conductive tape that provides not only good thermal conducting ability but also strong mechanical bonding between the mating surfaces. It has been shown that a small fraction of CNTs as filling material could induce a 125% enhancement in thermal transport. This interface material can be directly applied to any interface that needs high thermal conductivity.

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