Surface enrichment of Pt in Ga2O3 films grown on liquid Pt/Ga alloys

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Grabau M, Krick Calderon S, Rietzler F, Niedermaier I, Taccardi N, Wasserscheid P, Maier F, Steinrück HP, Papp C
Zeitschrift: Surface Science
Verlag: Elsevier
Jahr der Veröffentlichung: 2016
Band: 651
Seitenbereich: 16-21
ISSN: 0039-6028


Abstract


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.



FAU-Autoren / FAU-Herausgeber

Grabau, Mathias
Lehrstuhl für Physikalische Chemie II
Krick Calderon, Sandra
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Niedermaier, Inga
Lehrstuhl für Physikalische Chemie II
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Rietzler, Florian
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Taccardi, Nicola Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

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.

BibTeX: 

Zuletzt aktualisiert 2018-05-10 um 21:50