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    Studies of the structure and growth mode of dotriacontane films by synchrotron x-ray scattering and molecular dynamics simulations

    Mo, Haiding, 1969-
    Trogisch, S.
    Taub, Haskell
    Ehrlich, S. N.
    Volkmann, Ulrich G.
    Hansen, Flemming Y.
    Pino, M.
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    [PDF] StudiesStructureGrowthModeDotriacontane.pdf (149.2Kb)
    Date
    2004
    Format
    Article
    Metadata
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    Abstract
    We report on synchrotron x-ray scattering experiments and molecular dynamics simulations of the structure and growth mode of dotriacontane (n-C32H66 or C32) films adsorbed on Ag(111) and SiO2-coated Si(100) substrates. On the SiO2 surface, the x-ray measurements confirm a structural model of the solid film inferred from high-resolution ellipsometry measurements in which one or two layers of C32 adsorb with the long axis of the molecule oriented parallel to the interface followed by a monolayer in which the molecules have a perpendicular orientation. At higher C32 coverages, preferentially oriented bulk particles nucleate, consistent with a Stranski-Krastanov growth mode. On the Ag(111) surface, we again observe one or two layers of the 'parallel' film but no evidence of the perpendicular monolayer before nucleation of the preferentially oriented bulk particles. We compare the experimentally observed structures with molecular dynamics simulations of a multilayer film of the homologous C24 molecule.
    URI
    http://hdl.handle.net/10355/8753
    Part of
    Missouri Research Reactor publications (MU)
    Citation
    H Mo et al 2004 J. Phys.: Condens. Matter 16 S2905
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    • Missouri Research Reactor publications (MU)
    • Physics and Astronomy publications (MU)

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