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    Reactive conversion of polycrystalline SnO2 into single-crystal nanofiber arrays at low oxygen partial pressure

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    Date
    2008-10
    Author
    Carney, Carmen M.
    Akbar, Sheikh A.
    Cai, Ye
    Yoo, Sehoon
    Sandhage, Kenneth H.
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    Abstract
    Single-crystal SnO₂ nanofibers have been formed from SnO2 polycrystals via reaction at low oxygen partial pressures. Polycrystalline SnO₂ disks coated with Au nanoparticles were exposed to humid H2/N2 at 700 to 800 °C. Single-crystal SnO₂ nanofibers formed beneath Au nanoparticles, with the nanofiber length oriented parallel to the [100] crystallographic direction of SnO₂. Because this simple process does not require either a separate source of a Sn–O-bearing vapor species located upstream of the substrate or a temperature gradient, single-crystal nanofibers may be formed on large area SnO₂-bearing substrates.
    URI
    http://hdl.handle.net/1853/45231
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