Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/25157

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Title
Step mediated surface alloy formation of Pt/Cu(111)
Author/Creator
Dastoor, Paul Christopher;  O'Connor, Daryl John;  MacLaren, D A;  Allison, W;  Noakes, T C Q;  Bailey, P
Description
Medium energy ion scattering has been used to probe the early stages of the development of a surface alloy of platinum deposited on Cu(111). Our experiments reveal the presence of a novel two-layer "precursor" Pt-Cu alloy at low temperatures prior to formation of the expected Cu3Pt surface alloy at near 550 K. Comparison of the alloying behaviour of one monolayer of platinum on a nominally flat copper surface with that on a vicinal copper surface, Cu(12 12 11), demonstrates that the formation of this precursor alloy is mediated by steps on the surface. A model is proposed for the mechanism of formation of this precursor alloy, which occurs at much lower temperatures than previously observed for surface alloying of the platinum-copper system. (c) 2005 Elsevier B.V. All rights reserved.
Relation
Surface Science Vol. 588, no. 1-3, p. 101-107
Date
2005
Publisher
North-Holland Pub. Co
Keyword(s)
medium energy ion scattering (MEIS);  growth;  diffusion and migration;  step formation and bunching;  energy ion-scattering;  adsorption;  platinum;  cu(111);  films;  ni
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/25157
Identifier
ISSN:0039-6028
Language
eng
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Subject
"Surface Science"
 
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