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    In situ imaging of field emission from individual carbon nanotubes and their structural damage

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    2002-20_02_APL_4.pdf (437.9Kb)
    Date
    2002-02-04
    Author
    Wang, Z. L. (Zhong Lin)
    Gao, Rui Ping
    De Heer, W. A.
    Poncharal, P.
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    Abstract
    Field emission of individual carbon nanotubes was observed by in situ transmission electron microscopy. A fluctuation in emission current was due to a variation in distance between the nanotube tip and the counter electrode owing to a "head-shaking" effect of the nanotube during field emission. Strong field-induced structural damage of a nanotube occurs in two ways: a piece-by-piece and segment-by-segment pilling process of the graphitic layers, and a concentrical layer-by-layer stripping process. The former is believed owing to a strong electrostatic force, and the latter is likely due to heating produced by emission current that flowed through the most outer graphitic layers.
    URI
    http://hdl.handle.net/1853/27095
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