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Microelectromechanical systems, or MEMS, play a key role in gyroscopes, tiny chemical sensors, optical switches used in the telecom industry, and more. An even smaller version of the technology--nanoelectromechanical systems, or NEMS--could likewise have broad technological importance. Vera Sazonova has made the world's smallest NEMS device: a tiny resonator that consists of a single carbon nanotube suspended over a silicon gate. A voltage at the gate makes the nanotube vibrate, creating a high-frequency current. Since the current is hard to detect, Sazonova applied another voltage at a slightly different frequency; the two signals mix to create a third, low-frequency current that is easier to pick up. Potential applications include ultrasensitive motion detectors, sensors that can detect the mass of molecules, and even devices for detecting gravitational waves.
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Marina Sokolova, Kanyi Huang,Stan Matwin,Joshua Ramisch,Vera Sazonova, Renee Black,Chris Orwa, Sidney Ochieng,Nanjira Sambuli
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Future Trends in Microelectronicspp.307-316, (2010)
QUANTUM SENSING AND NANOPHOTONIC DEVICES VII (2010)
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