Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO 2 (110) Surface-Reference-Cited by-同舟云学术

Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO 2 (110) Surface

Published:2003-01-17 Issue:5605 Volume:299 Page:377-379
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Schaub Renald¹,Wahlström Erik¹,Rønnau Anders¹,Lægsgaard Erik¹,Stensgaard Ivan¹,Besenbacher Flemming¹

Affiliation:

1. Interdisciplinary 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 TiO 2 (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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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