| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1690444 | Vacuum | 2007 | 4 Pages |
Abstract
Reactivity of deposited tungsten towards TiO2(1Â 1Â 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(1Â 1Â 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(1Â 1Â 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Sylvie Bourgeois, Bruno Domenichini, Frantisek Sutara, Vladimir Matolin,