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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/34090
Record Status
Checked
Record Id
34090
Title
Step mediated surface alloy formation of Pt/Cu(1 1 1)
Contributors
PC Dastoor (Newcastle U., Aus.)
,
DJ O'Connor (Newcastle U., Aus.)
,
DA McLaren (Cambridge U.)
,
W Allison (Cambridge U.)
,
TCQ Noakes (CCLRC Daresbury Lab.)
,
P Bailey (CCLRC Daresbury Lab.)
Abstract
Medium energy ion scattering has been used to probe the early stages of the development of a surface alloy of platinum deposited on Cu(1 1 1). 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.
Organisation
CCLRC
,
SND
,
MEIS
Keywords
Physics
Funding Information
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Language
English (EN)
Type
Details
URI(s)
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Year
Journal Article
Surf Sci
588, no. 1-3 (2005): 101-107.
doi:10.1016/j.susc.2005.05.034
2005
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