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Horizontally Grown Nanowires Yield ‘NanoLEDs’

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GAITHERSBURG, Md., Oct. 6, 2010 — While refining their novel method for making nanoscale wires, chemists at the National Institute of Standards and Technology (NIST) discovered an unexpected bonus — a new way to create nanowires that produce light similar to that from LEDs. These "nanoLEDs” may one day have their light-emission abilities put to work serving miniature devices such as nanogenerators or lab-on-a-chip systems. Graphic illustrates a single row of nanowires (cylinders with red tops) with fin-shaped nanowalls extending outward. (Images: NIST) Nanowires typically are “grown” by the...Read full article

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    Published: October 2010
    Glossary
    chemical vapor deposition
    Chemical vapor deposition is a process of applying dopants to a glass bait by flame reactions of gaseous compounds. See also outside vapor-phase oxidation; inside vapor-phase oxidation.
    gallium nitride
    Gallium nitride (GaN) is a compound made up of gallium (Ga) and nitrogen (N). It is a wide-bandgap semiconductor material that exhibits unique electrical and optical properties. Gallium nitride is widely used in the production of various electronic and optoelectronic devices, including light-emitting diodes (LEDs), laser diodes, power electronics, and high-frequency communication devices. Key points about gallium nitride (GaN): Chemical composition: Gallium nitride is a binary compound...
    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.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    transmission electron microscope
    A type of microscope that uses magnetic lenses to transmit a beam of electrons through an object; the electrons are then focused on a fluorescent screen to form an enlarged image.
    AmericasAndrew HerzingBabak Nikoobakhtchemical vapor depositiongallium nitrideHorizontally-grown Nanowireslab-on-a-chipLight SourcesMicroscopynanonanocrystal growthnanogeneratorsNanoLEDsnanoscale wiresnanowallnanowiresNISTp-n heterojunctionphotonicsResearch & TechnologySensors & Detectorstransmission electron microscopezinc oxide moleculesLEDs

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