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Epitaxy and Atomic Structure Determination of Au/TiO2 Interfaces by Combined EBSD and HRTEM

Published online by Cambridge University Press:  10 February 2011

F. Cosandey  and
P. Stadelmann
F. Cosandey
Affiliation:
Department of Ceramic and Materials Engineering, Rutgers University, Piscataway, NJ 08854-8065, cosandey@scils.rutgers.edu
P. Stadelmann
Affiliation:
Centre Interdepartemental de Microscopie Electronique, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland
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Abstract

We have studied the effects of deposition conditions on the epitaxial orientation of Au or TiO2 (110) and on the atomic structure of Au/TiO2 interfaces by combined EBSD and HRTEM. Two experimental conditions were explored consisting of deposition of a 12 nim Au film at 300K followed by annealing at 770K and direct deposition of a 12 nm Au film at 770K. Deposition at 300K followed by annealing at 770K give rise to a (111)Au//(110)TiO2 epitaxial orientation relationship, while direct deposition at 700K temperature give rise to an epitaxial orientation relationship given by (112)Au//(110)TiO2. For both orientations, two epitaxial variants are observed which are twin related. The (112)Au//(110)TiO2 orientation has been found to minimize the interfacial lattice misfit while maximizing the number of Au-Ti bonds across the interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 589 , 1999 , 235
Copyright
Copyright © Materials Research Society 2001

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