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Facet Formation on Single Crystal TiO2 Surfaces Studied by Atomic Force Microscopy

Published online by Cambridge University Press:  21 February 2011

M. D. Antonik ,
J. C. Edwards  and
R. J. Lad
M. D. Antonik
Affiliation:
Laboratory for Surface Science & Technology, University of Maine, Orono, ME 04469.
J. C. Edwards
Affiliation:
Laboratory for Surface Science & Technology, University of Maine, Orono, ME 04469.
R. J. Lad
Affiliation:
Laboratory for Surface Science & Technology, University of Maine, Orono, ME 04469.
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Abstract

Atomic force microscopy (AFM) and low energy electron diffraction (LEED) have been used to study the faceting behavior on (001) and (100) surfaces of a TiO2 single crystal. On the TiO2 (001) surface, LEED patterns characteristic of {011} facet planes develop after annealing below 900 °C in agreement with previous studies, but AFM shows a complex surface morphology consisting of a large distribution of facet sizes and orientations. After annealing at 1300 °C, facets do not form but rather a network of 5 – 30 nm high ridges develops over the entire surface. These ridges may be the result of surface defects produced by changes in bulk stoichiometry during annealing. On the TiO2 (100) surface, facets are also observed after annealing below 900 °C. However, these facets have extremely small height to width aspect ratios and are not discernible with LEED.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 237: Symposium Ca – Interface Dynamics and Growth , 1991 , 459
Copyright
Copyright © Materials Research Society 1992

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References

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