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LED efficiency puzzle solved by theorists using quantum-mechanical calculations

Researchers at the University of California, Santa Barbara, say they've figured out the cause of a problem that's made light-emitting diodes (LEDs) impractical for general lighting purposes. Their work will help engineers develop a new generation of high-performance, energy-efficient lighting that could replace incandescent and fluorescent bulbs.

Posted: Apr 19th, 2011

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New biosensor microchip holding more than 100,000 nanosensors could speed up drug development

A new biosensor microchip that could hold more than 100,000 magnetically sensitive nanosensors could speed up drug development markedly, Stanford researchers say. The nanosensors analyze how proteins bond - a critical step in drug development. The ultrasensitive sensors can simultaneously monitor thousands of times more proteins than existing technology, deliver results faster and assess the strength of the bonds.

Posted: Apr 19th, 2011

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Atomic electrical field sensor using single diamond spins

Electrical fields play a pivotal role in numerous cases in both nature and technical areas: by changing the electrical field, impulses of nerves are transmitted and modern data storage operates by saving electrical charges the so-called Flash Memories. An ultra-precise reading of electrical fields, however, is still a challenge for physical measurement techniques. Researchers from the University of Stuttgart succeeded in measuring electrical fields with the aid of one single defect center in diamond.

Posted: Apr 19th, 2011

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Novel electrode for flexible thin-film solar cells

Conventional silicon-based rigid solar cells generally found on the market are not suitable for manufacturing moldable thin-film solar cells, in which a transparent, flexible and electrically conductive electrode collects the light and carries away the current. A woven polymer electrode developed by Empa has now produced first results which are very promising, indicating that the new material may be a substitute for indium tin oxide coatings.

Posted: Apr 19th, 2011

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Nanotechnology transistor powered by single electrons

A team from Pitt, UW-Madison and HP Labs reports in Nature Nanotechnology a 1.5-nanometer single-electron transistor that could lead to long-lasting, ultradense computer memories, quantum computers and advanced electronics.

Posted: Apr 18th, 2011

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