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Intrinsic Point Defects on a TiO2(110) Surface and Their Reaction with Oxygen: A Scanning Tunneling Microscopy Study

Published online by Cambridge University Press:  15 February 2011

Markus Kuhn ,
J. F. Anderson ,
Jeremy Lehman ,
Talib Mahmoud  and
Ulrike Diebold
Markus Kuhn
Affiliation:
Department of Physics, Tulane University, New Orleans, LA 70118
J. F. Anderson
Affiliation:
Department of Physics, Tulane University, New Orleans, LA 70118
Jeremy Lehman
Affiliation:
Department of Physics, Tulane University, New Orleans, LA 70118
Talib Mahmoud
Affiliation:
Department of Physics, Tulane University, New Orleans, LA 70118
Ulrike Diebold
Affiliation:
Department of Physics, Tulane University, New Orleans, LA 70118
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Abstract

The interaction of molecular oxygen, at room temperature, with a reduced TiO2(110) surface has been studied in situ by scanning tunneling microscopy (STM). Oxygen vacancies (point defects) were created on a clean TiO2(110) surface by annealing in ultra-high vacuum and successfully imaged on the atomic scale. These point defect sites were stable under ultrahigh vacuum conditions. During exposure to molecular oxygen, new point defects appear at different locations on the surface although their overall number is reduced. A mechanism for this dynamic healing process is proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 474: Symposium L – Epitaxial Oxide Thin Films III , 1997 , 359
Copyright
Copyright © Materials Research Society 1997

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