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NEMS Oscillators May Detect Toxins

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ITHACA, N.Y., March 18, 2010 - By watching how energy moves across a tiny device, Cornell researchers are a step closer to creating extraordinarily tiny sensors that can instantly recognize harmful substances in air or water. Led by physics professor Harold Craighead, the investigators made a device just 200 nm thick and a few microns long with an oscillating cantilever hanging off one end. They identified exactly how to tune its sensitivity - a breakthrough that could lead to advanced sensing technologies. The experiments detailed how these oscillators, which are nanoelectromechanical systems, could one day be made...Read full article

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    Published: March 2010
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    silicon dioxide
    An abundant material found in the form of quartz and agate and as one of the major constituents of sand. The silicates of sodium, calcium, and other metals can be readily fused, and on cooling do not crystallize, but instead form the familiar transparent material glass.
    acoustical wavesAmericasBiophotonicsCornell NanoScale Science and Technology Facilitydetect toxinsE. coliHarold CraigheadImagingIthacananonanoelectromechanical systemsnanosensorNEMSNew YorkoscillatorResearch & Technologyresonant frequencyRob Ilicsensing technologiesSensors & Detectorssilicon dioxideTest & MeasurementLasers

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