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Abstract.

The slowing down of Co10Ag191 and Co285Ag301 nanoclusters on a Ag (100) surface is studied at the atomic scale by means of classical Molecular Dynamics simulations. The slowing down energy, 0.25 to 1.5 eV/atom, is characteristic of low energy cluster beam deposition and aerosol focused beam techniques. The two clusters differentiate by their size, stoechiometry and structure. While Co forms one or several groups just beneath the cluster surface in Co10Ag191, Co285Ag301 displays a core-shell structure where Ag forms one complete monolayer around the Co core. As a consequence of the impact, the smallest cluster undergoes deep reorganization and becomes fully epitaxial with the substrate. The larger one only undergoes partial accommodation and partially retains the memory of its initial morphology. For both, after impact, the Co forms one group covered by Ag. The substrate damage is significant and depends on the slowing down energy. It results in a Ag step surrounding the cluster which may be more than one atomic layers high and isolated add-atoms or small monolayer islands apart from the step. The latter originate from the cluster and the former from the substrate. Further details in the consequences of the impact are given, concerning the cluster penetration, its deformation and lattice distortions, with emphasis on the cluster size and stoechiometry.

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Correspondence to M. Hou.

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Received: 11 June 2004, Published online: 31 August 2004

PACS:

35.40.-c - 61.46. + w Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals - 07.05.Tp Computer modeling and simulation

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Dzhurakhalov, A., Rasulov, A., Van Hoof, T. et al. Ag-Co clusters deposition on Ag(100): an atomic scale study. Eur. Phys. J. D 31, 53–61 (2004). https://doi.org/10.1140/epjd/e2004-00115-2

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  • DOI: https://doi.org/10.1140/epjd/e2004-00115-2

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