- Title
- Step mediated surface alloy formation of Pt/Cu(111)
- Creator
- Dastoor, Paul Christopher; O'Connor, Daryl John; MacLaren, D A; Allison, W; Noakes, T C Q; Bailey, P
- Relation
- Surface Science Vol. 588, no. 1-3, p. 101-107
- Publisher
- North-Holland Pub. Co
- Resource Type
- journal article
- Date
- 2005
- 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.
- Subject
- medium energy ion scattering (MEIS); growth; diffusion and migration; step formation and bunching; energy ion-scattering; adsorption; platinum; cu(111); films; ni
- Identifier
- http://hdl.handle.net/1959.13/25157
- Identifier
- uon:129
- Identifier
- ISSN:0039-6028
- Language
- eng
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