Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO 2 (110) Surface
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- 17 January 2003
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 299 (5605), 377-379
- https://doi.org/10.1126/science.1078962
Abstract
Defects such as oxygen vacancies play a crucial role in the surface properties of transition metal oxides. By means of time-resolved, high-resolution scanning tunneling microscopy, we unraveled an adsorbate-mediated diffusion mechanism of oxygen vacancies on rutile TiO2(110). Adsorbed oxygen molecules mediate vacancy diffusion through the loss of an oxygen atom to a vacancy and the sequential capture of an oxygen atom from a neighboring bridging oxygen row, leading to an anisotropic oxygen vacancy diffusion pathway perpendicular to the bridging oxygen rows.Keywords
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