Reactivity between molybdenum and TiO2(110) surfaces : evidence of a sub-monolayer mode and a multilayer mode
Small amounts of molybdenum (from 0.03 to 1.3 eqML) were deposited on non-stoichiometric TiO2(1 1 0) surface. The deposits were investigated by means of LEED and X-ray/UV photoemission using synchrotron radiation. For the smallest coverage ( < 0.2 eqML), deposition leads to oxidation of molybdenu...
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| Veröffentlicht in: | Applied surface science 2005-05, Vol.244 (1-4), p.403-407 |
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| creator | DOMENICHINI, B KRÜGER, P BREVET, A BOURGEOIS, S LI, Z MØLLER, P. J |
| description | Small amounts of molybdenum (from 0.03 to 1.3 eqML) were deposited on non-stoichiometric TiO2(1 1 0) surface. The deposits were investigated by means of LEED and X-ray/UV photoemission using synchrotron radiation. For the smallest coverage ( < 0.2 eqML), deposition leads to oxidation of molybdenum into species close to Mo4+. In such a case, states appearing in TiO2 band gap are mainly due to reduced titanium. For higher coverages, metallic behaviour of molybdenum is observed. This phenomenon was explained, thanks to first principle calculations, as a decrease of the Mo-O interactions for the benefit of the Mo-Mo interactions as the surface molybdenum atom density increases. |
| doi_str_mv | 10.1016/j.apsusc.2004.09.149 |
| format | Article |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Density functional theory, local density approximation Electron and ion emission by liquids and solids impact phenomena Exact sciences and technology Photoemission and photoelectron spectra Physics |
| title | Reactivity between molybdenum and TiO2(110) surfaces : evidence of a sub-monolayer mode and a multilayer mode |
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