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Kinetics Of The Growth Of Copper Clusters On The Alumina (0001) Surface : Influence Of Surface Structure

Published online by Cambridge University Press:  10 February 2011

M. Gautier-Soyek ,
S. Gota ,
L. Douillard ,
P. Le Fevre ,
H. Magnan  and
J. P. Duraud
M. Gautier-Soyek
Affiliation:
CEA, DSM / DRECAM / SRSIM, CEA / SACLAY, 91191 - Gif sur Yvette Cedex, [email protected]
S. Gota
Affiliation:
CEA, DSM / DRECAM / SRSIM, CEA / SACLAY, 91191 - Gif sur Yvette Cedex
L. Douillard
Affiliation:
CEA, DSM / DRECAM / SRSIM, CEA / SACLAY, 91191 - Gif sur Yvette Cedex
P. Le Fevre
Affiliation:
LURE, batiment 209 D, Université Paris Sud, 91405 Orsay Cedex
H. Magnan
Affiliation:
CEA, DSM / DRECAM / SRSIM, CEA / SACLAY, 91191 - Gif sur Yvette Cedex
J. P. Duraud
Affiliation:
Laboratoire Pierre Süe, CEA-CNRS, CEA / SACLAY, 91191 - Gifsur Yvette Cedex
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Abstract

The kinetics of the growth of copper clusters on the alumina (0001) surface was studied as a function of surface structure, using EXAFS at the Cu K edge. Equivalent Cu coverages ranging from 0.5 to 4 equivalent monolayers were deposited in situ, at room temperature, on alumina (0001) surfaces exhibiting the (1×1) or the reconstructed structure. The evolution of mean cluster size with deposition time was followed from the mean Cu coordination number in the clusters deduced from the EXAFS data. The increase of the mean cluster radius with deposition time is characteristic of a coalescence mechanism on both surfaces. The growth is quicker on the reconstructed surface, likely due to different surface diffusion properties of both surfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 524: Symposium V – Application of Synchrotron Radiation Techniques…IV , 1998 , 315
Copyright
Copyright © Materials Research Society 1998

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References

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