Interaction of oxygen with Au/Ti(0001) surface alloys studied by photoelectron spectroscopy

0438348 - FZÚ 2015 RIV GB eng J - Článek v odborném periodiku
Tsud, N. - Šutara, F. - Matolínová, I. - Veltruská, K. - Dudr, Viktor - Prince, K. C. - Matolín, V.
Interaction of oxygen with Au/Ti(0001) surface alloys studied by photoelectron spectroscopy.
Journal of Physics-Condensed Matter. Roč. 22, č. 26 (2010), "265002-1"-"265002-7". ISSN 0953-8984. E-ISSN 1361-648X
Grant CEP: GA MŠMT(CZ) LC06058
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: Ti(0001) surface * titanium * oxidation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.332, rok: 2010

The interaction of oxygen with gold adsorbed on Ti(0001) was studied by synchrotron radiation photoelectron spectroscopy. Two kinds of surfaces were explored: as-deposited 0.38, 1.16 and 1.85 monolayer (ML) thick Au overlayers on the Ti(0001) surface, and the same samples after thermal treatment, which resulted in the formation of Au-Ti intermetallic surfaces. The Ti 3p core level was strongly affected by reaction with oxygen, while the Au 4f core level showed only minor changes other than a decrease in intensity. The Ti 3p peak was fitted with several components which were identified as Ti atoms in different oxidation states, namely TiO, Ti2O3, TiO2 and Ti-OH. Titanium oxide phase formation is accompanied by Au-Ti bond dissociation and outward diffusion of Ti. The presence of an Au-Ti intermetallic phase on the Ti(0001) surface promotes oxidation of the Ti atoms.
Trvalý link: http://hdl.handle.net/11104/0241766