Metal/oxide interfacial reactions: Oxidation of metals on SrTiO3 (100) and TiO2 (110).
作者： Qiang Fu , Thomas Wagner
DOI: 10.1021/JP050601I
关键词: Fermi level 、 Inorganic chemistry 、 X-ray photoelectron spectroscopy 、 Metal 、 Oxide 、 Chemical engineering 、 Chemical reaction 、 Work function 、 Ionic bonding 、 Chemistry 、 Reactivity (chemistry)
摘要: We studied chemical reactions between ultrathin metal films (Al, Cr, Fe, Mo) and single-crystal oxides (SrTiO3 (100), TiO2 (110)) with X-ray photoelectron spectroscopy (XPS). The work function of the electron density in oxide strongly influence reaction onset temperature (T(RO)), where oxidation is first observed, rate at metal/oxide interfaces. Fermi levels two contacting phases affect both space charges formed interfaces diffusion ionic defects across These processes, which determine kinetics relatively low temperatures, can be understood framework Cabrera-Mott theory. results suggest that interfacial reactivity tunable by modifying level (E(F)) phases. This effect great technological importance for a variety devices heterophase boundaries.
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