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Updated: Jul 23, 2026

Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Oxygen-mediated diffusion of oxygen vacancies on the TiO2(110) surface
Renald Schaub1, Erik Wahlström, Anders Rønnau
1Interdisciplinary Nanoscience Center, Department of Physics and Astronomy and CAMP, University of Aarhus, DK-8000 Aarhus C, Denmark.
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.
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