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Nanoscale Light Detectors Provide Mega-Performance

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Hank Hogan

On the surface, nanowires would seem to make poor light detectors, but it is a nanowire’s surface that produces just the opposite outcome. Those are the findings of a team of scientists from the University of California, San Diego, that investigated the mechanisms responsible for high internal gain in ultraviolet photodetectors made with zinc oxide nanowires. When struck by photons above a certain energy, a nanowire generates holes and electrons. Because the holes are readily trapped at the surface, the electrons flow more freely, leading to increased photoconduction. Reprinted with...Read full article

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    Published: July 2007
    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.
    Featureslight detectorsnanonanowiresSensors & Detectorsultraviolet photodetectors

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