Temperature induced changes in a AgPt nanofilm on Ru(0001)

Nanometer thick AgPt films deposited in a layer-by-layer fashion onto Ru(0001) at room temperature (RT) were investigated using high-resolution photoelectron spectroscopy. A four layer film, Pt(1)Ag(1)Pt(1)Ag(1)/Ru(0001), with one monolayer of Ag as the first deposited material on Ru(0001), shows a...

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Bibliographic Details
Published in:Journal of vacuum science & technology. A, Vacuum, surfaces, and films Vacuum, surfaces, and films, 2012-01, Vol.30 (1), p.01A111-01A111-7
Main Authors: Onsgaard, Jens, Jan Godowski, P., Shen Li, Zhe
Format: Article
Language:English
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Summary:Nanometer thick AgPt films deposited in a layer-by-layer fashion onto Ru(0001) at room temperature (RT) were investigated using high-resolution photoelectron spectroscopy. A four layer film, Pt(1)Ag(1)Pt(1)Ag(1)/Ru(0001), with one monolayer of Ag as the first deposited material on Ru(0001), shows a small intermixing of Ag and Pt during deposition at RT. The Pt4f7/2 spectra exhibit the most pronounced core level shifts during heating; an effect caused by clustering of Pt inside the film. No alloying of Ag and Pt is observed. This behavior is in contrast to that of analog AgPd films on Ru(0001) where alloying takes place. Annealing of the layered AgPt film in the temperature interval of RT to 625 °C results in the segregation of Ag at the surface and a complete desorption of Ag takes place at 625 °C.
ISSN:0734-2101
1520-8559
DOI:10.1116/1.3653986