Ultrathin VOx/TiO2(110) (x approximate to 1) film preparation by controlled oxidation of metal deposits

Michela Della Negra, Mauro Sambi, Gaetano Granozzi

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Metallic vanadium ultrathin films deposited on the TiO2 (110) surface are easily oxidised to VO2 when they react with O2 in the high vacuum pressure range. We have found that the oxidation can be stopped at VOx (x#1) when annealing of the metal film is carried out in UHV, by exploiting the reaction with bulk-to-surface diffusing oxygen. By adopting carefully optimised experimental conditions (e.g. metal film thickness and annealing temperature), locally ordered VOx films with a thickness of up to 5 ML can be prepared. X-ray photoelectron spectroscopy and anglescanned photoelectron diffraction, as an in situ structural characterisation tool, have proven to be extremely useful in order to find optimised conditions for the whole process. © 1999 Elsevier Science B.V. All rights reserved.
Keyword: Titanium oxide,Photoelectron diffraction,X-ray photoelectron spectroscopy,Vanadium oxide,Epitaxy
Original languageEnglish
JournalSurface Science
Volume436
Pages (from-to)227-236
ISSN0039-6028
DOIs
Publication statusPublished - 1999
Externally publishedYes

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