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Adatom-induced diffusion of two-dimensional close-packed Pt-7 clusters on Pt(111)
Linköpings universitet, Institutionen för fysik, kemi och biologi, Teoretisk Fysik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
1996 (engelsk)Inngår i: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 355, nr 1-3, s. L325-L330Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
1996. Vol. 355, nr 1-3, s. L325-L330
Emneord [en]
adatoms; atomistic dynamics; clusters; epitaxy; molecular dynamics; nucleation; platinum; surface diffusion
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-105982DOI: 10.1016/0039-6028(96)00045-3OAI: oai:DiVA.org:liu-105982DiVA, id: diva2:712787
Tilgjengelig fra: 2014-04-16 Laget: 2014-04-15 Sist oppdatert: 2017-12-05

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