Grabau M, Krick Calderon S, Rietzler F, Niedermaier I, Taccardi N, Wasserscheid P, Maier F, Steinrück HP, Papp C (2016)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2016
Publisher: Elsevier
Book Volume: 651
Pages Range: 16-21
DOI: 10.1016/j.susc.2016.03.009
The formation of surface GaO films on liquid samples of Ga, and Pt-Ga alloys with 0.7 and 1.8 at.% Pt was examined using near-ambient pressure (NAP) X-ray photoelectron spectroscopy (XPS). Thickness, composition and growth of the oxide films were deduced as a function of temperature and Pt content of the alloys, in ultra-high vacuum and at oxygen pressures of 3 × 10, 3 × 10 and 1 mbar. We examined oxide layers up to a thickness of 37 Å. Different growth modes were found for oxidation at low and high pressures. The formed GaO oxide films showed an increased Pt content, while the pristine GaPt alloy showed a surface depletion of Pt at the examined temperatures. Upon growth of GaO on Pt/Ga alloys a linear increase of Pt content was observed, due to the incorporation of 3.6 at.% Pt in the GaO. The Pt content in GaO, at the examined temperatures and bulk Pt concentrations is found to be independent of pressure, temperature and the nominal Pt content of the metallic alloy.
APA:
Grabau, M., Krick Calderon, S., Rietzler, F., Niedermaier, I., Taccardi, N., Wasserscheid, P.,... Papp, C. (2016). Surface enrichment of Pt in Ga2O3 films grown on liquid Pt/Ga alloys. Surface Science, 651, 16-21. https://dx.doi.org/10.1016/j.susc.2016.03.009
MLA:
Grabau, Mathias, et al. "Surface enrichment of Pt in Ga2O3 films grown on liquid Pt/Ga alloys." Surface Science 651 (2016): 16-21.
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