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February 19th, 2004
Attogram Mass Detection
Attogram mass detection has been achieved by Harold Craighead and his colleagues at Cornell, with prospects of exquisite detection of very tiny chemical and biological species, possibly with arrays of detectors. With their lithographically fabricated nanoelectromechanical (NEMS) device, the Cornell researchers can measure the mass of a particle with a sensitivity of 10-18 grams, far exceeding the precision of a comparable device with femtogram (10-15 g) sensitivity reported last year.
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