Metal-rich Au-silicide nanoparticles for use in nanotechnology

We present a route to functionalize chemically and magnetically silicon surfaces by a local passivation, taking advantage of Stranski-Krastanov growth mode of the Au-Si(111) system. Metal-rich Au-silicide nanoparticles, supported on a Si-rich two-dimensional Au-silicide layer, are obtained. Subseque...

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Bibliographic Details
Published in:Applied physics letters 2009-06, Vol.94 (23), p.233101-233101-3
Main Authors: Moyen, E., Macé, M., Agnus, G., Fleurence, A., Maroutian, T., Houzé, F., Stupakiewicz, A., Masson, L., Bartenlian, B., Wulfhekel, W., Beauvillain, P., Hanbücken, M.
Format: Article
Language:English
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Summary:We present a route to functionalize chemically and magnetically silicon surfaces by a local passivation, taking advantage of Stranski-Krastanov growth mode of the Au-Si(111) system. Metal-rich Au-silicide nanoparticles, supported on a Si-rich two-dimensional Au-silicide layer, are obtained. Subsequently deposited Co is used to form magnetic nanostructures. The two Au silicides display a different chemical reactivity with Co enabling the fabrication of localized magnetic Co nanodots. These magnetic nanostructures can be aligned along step bunches of a vicinal Si(111) surface. By varying the growth parameters, the particle density can be tuned from 10 9 to the low 10 12   dots / in . 2 .
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3148782