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RESEARCH PRODUCT
Refractory metal reactivity towards oxide surface : W/TiO2(1 1 0) case.
František ŠUtaraVladimír MatolínVladimír MatolínBruno DomenichiniSylvie Bourgeoissubject
Materials sciencePhotoemission spectroscopyAnnealing (metallurgy)Single-crystal surfacesInverse photoemission spectroscopyOxideAnalytical chemistrychemistry.chemical_elementAngle-resolved photoemission spectroscopy02 engineering and technologyTungsten7. Clean energy01 natural sciencesTungstenchemistry.chemical_compound0103 physical sciences010306 general physicsInstrumentationPACS 68.55.Jk; 81.15.Ef; 61.14.QpRefractory metals021001 nanoscience & nanotechnologyCondensed Matter PhysicsSurfaces Coatings and FilmsCrystallographychemistryMolybdenumTitanium dioxide0210 nano-technologyPhotoemissiondescription
International audience; Reactivity of deposited tungsten towards TiO2(1 1 0) surface was studied using synchrotron radiation photoemission spectroscopy (both core levels, valence band and resonant photoemission) on Materials Science Beamline at ELETTRA. W depositions carried out at room temperature on TiO2(1 1 0) surface give rise to an interfacial reaction which leads to a metastable situation due to kinetic limitations. Annealing induces chemical changes which are function of the initial coverage; for fractional coverage, annealing induces completion of oxidation of deposit whereas reduction to metallic tungsten occurs for highest coverage. These results demonstrate that interaction of W with TiO2(1 1 0) surface is, as the one of molybdenum, driven by a balance between W–O interactions and W–W depending on tungsten atoms density on TiO2 surface.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-09-23 |