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In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
Published on: June 16, 2014
Self-organisation of size-selected Co(x)Pt(1-x) clusters on graphite
L Bardotti1, F Tournus, C Albin
1Institut Lumière Matière, UMR 5306, Université Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France. laurent.bardotti@univ-lyon1.fr.
Abstract:
Sub-monolayer thin film morphologies obtained by deposition of size-selected CoxPt1-x clusters on graphite have been analyzed for different values of x. In all cases, the preformed clusters can easily diffuse on the surface and gather to form islands of clusters. By changing the cluster stoichiometry, very different morphologies can be obtained, going from large ramified islands to "bunches" of non-contacting incident clusters. We put into evidence that the introduction of platinum atoms in the incident particles drastically changes the interaction between clusters and offers the opportunity to control the coalescence process between them. In this way, by modifying the cluster reactivity, a local self-organization of size-selected magnetic nanoparticles can be achieved.
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