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Researchers use carbon nanotubes to develop uncooled infrared detector


A team of researchers from Peking University, Duke University and the Chinese Academy of Sciences fabricated an "uncooled" ultrasensitive photovoltaic infrared detector using single-walled carbon nanotubes. Compared to conventional IR detectors based on mercury-cadmium-telluride alloy, carbon nanotube IR detectors are more efficient because the IR absorption can be tailored just by changing the diameter of the tube, and the response only takes a matter of picoseconds. This new detector does not require electric or liquid nitrogen cooling thanks to the thermal properties of carbon nanotubes, which are good heat conductors and release minimal IR radiation. The sensor design and performance are reported in Optical Materials Express, an open-access journal of the Optical Society of America. more

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