Oxygen Vacancy: The Invisible Agent on Oxide Surfaces

Pretty vacant. Oxide surfaces are continuously finding new applications in advanced technologies such as corrosion protection, thermal coating, catalysis, sensors, microelectronics, magnetic properties, etc. A understanding of the microscopic properties of oxide surfaces is closely related to the id...

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Bibliographic Details
Published in:Chemphyschem 2003-10, Vol.4 (10), p.1041-1047
Main Author: Pacchioni, Gianfranco
Format: Article
Language:English
Subjects:
Composition
defects and impurities
Condensed matter: structure, mechanical and thermal properties
defects
Exact sciences and technology
materials science
oxides
Physics
Solid surfaces and solid-solid interfaces
surfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:Pretty vacant. Oxide surfaces are continuously finding new applications in advanced technologies such as corrosion protection, thermal coating, catalysis, sensors, microelectronics, magnetic properties, etc. A understanding of the microscopic properties of oxide surfaces is closely related to the identification of the surface defects. Oxygen vacancies (see bright spots in picture) are particularly important defects but also very difficult to characterize. Recent advances in the use of STM allows one to follow the dynamics of the migration of oxygen vacancies on an oxide surface. Starting from a recent example of application of dynamic STM to TiO2, the role of oxygen vacancies on the chemistry of oxide surfaces is highlighted.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.200300835