Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO2(110) Surface

Renald Schaub; Erik Wahlström; Anders Rønnau; Erik Lægsgaard; Ivan Stensgaard; Flemming Besenbacher

doi:10.1126/science.1078962

Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO₂(110) Surface

Renald Schaub, Erik Wahlström, Anders Rønnau, Erik Lægsgaard, Ivan Stensgaard, Flemming Besenbacher

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	377-379
Number of pages	3
Journal	Science
Volume	299
Issue number	5605
DOIs	https://doi.org/10.1126/science.1078962
Publication status	Published - Jan 2003

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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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AU - Schaub, Renald

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AU - Rønnau, Anders

AU - Lægsgaard, Erik

AU - Stensgaard, Ivan

AU - Besenbacher, Flemming

N1 - This paper made the headlines in Chemical Engineering News (CENEAR 81 3, 9 (2003)), and had a significant impact. ISI citations 74

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N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0037449539

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IS - 5605

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Oxygen-Mediated Diffusion of Oxygen Vacancies on the TiO₂(110) Surface

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