Abstract
We have investigated the impact of small platinum clusters, Pt3-, on the surface of graphite for incident cluster energies in the range 50-1500 eV. The density of features observed in the STM rises markedly with increasing impact energy. Results for Pt3- clusters and the lighter Ag3- clusters can be overlaid, i.e. the feature density is independent of the cluster mass. This behaviour violates the binary elastic collision model for energy transfer to the substrate, but is consistent with recent simulations of the implantation of large clusters into the graphite surface.
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