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Adatom-induced diffusion of two-dimensional close-packed Pt-7 clusters on Pt(111)
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
1996 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 355, no 1-3, L325-L330 p.Article in journal (Refereed) Published
Abstract [en]

Molecular dynamics simulations were used to follow the dynamics of the motion of hexagonal Pt heptamers on Pt(111). Close packed Pt-7 clusters on fee sites were found to be very stable structures with reconfiguration or translation events occurring only rarely over simulation times >30 ns at 1000 K. The adsorption of a single adatom on the cluster surface, however, induced rapid intracluster bond breaking, reconfiguration, the introduction of stacking faults, and greatly enhanced cluster diffusion rates. Cluster migration occurred primarily through sequences of individual atom and concerted dimer jumps, but concerted cluster motion was also observed. The adatoms eventually descended to the terrace, predominantly through push-out/exchange reactions with cluster atoms at B edges.

Place, publisher, year, edition, pages
1996. Vol. 355, no 1-3, L325-L330 p.
Keyword [en]
adatoms; atomistic dynamics; clusters; epitaxy; molecular dynamics; nucleation; platinum; surface diffusion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-105982DOI: 10.1016/0039-6028(96)00045-3OAI: oai:DiVA.org:liu-105982DiVA: diva2:712787
Available from: 2014-04-16 Created: 2014-04-15 Last updated: 2017-12-05

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Münger, PeterChirita, ValeriuGreene, Joseph E

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