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    Influence of Quantum Size Effects on Island Coarsening

    Jeffrey, C. A.
    Conrad, Edward H.
    Feng, Rui
    Hupalo, M.
    Kim, Chinkyo
    Ryan, P. J.
    Miceli, Paul F.
    Tringides, M. C.
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    [PDF] InfluenceQuantumSizeEffects.pdf (368.9Kb)
    Date
    2006
    Format
    Article
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    Abstract
    Surface x-ray scattering and scanning-tunneling microscopy experiments reveal novel coarsening behavior of Pb nanocrystals grown on Si 111 - 7 7 . It is found that quantum size effects lead to the breakdown of the classical Gibbs-Thomson analysis. This is manifested by the lack of scaling of the island densities. In addition, island decay times are orders of magnitude faster than expected from the classical analysis and have an unusual dependence on the growth flux F (i.e., 1=F). As a result, a highly monodispersed 7-layer island height distribution is found after coarsening if the islands are grown at high rather than low flux rates. These results have important implications, especially at low temperatures, for the controlled growth and self-organization of nanostructures.
    URI
    http://hdl.handle.net/10355/7430
    Citation
    Phys. Rev. Lett. 96, 106105 (2006)
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