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Ion-beam synthesis of epitaxial Au nanocrystals in MgO

Published online by Cambridge University Press:  03 March 2011

S. Thevuthasan ,
V. Shutthanandan ,
C.M. Wang ,
W.J. Weber ,
W. Jiang ,
A. Cavanagh ,
J. Lian  and
L.M. Wang
S. Thevuthasan*
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
V. Shutthanandan
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
C.M. Wang
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
W.J. Weber
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
W. Jiang
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
A. Cavanagh
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
J. Lian
Affiliation:
Department of Materials Science Engineering and Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
L.M. Wang
Affiliation:
Department of Materials Science Engineering and Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
*
a)Address all correspondence to this author.e-mail: [email protected]
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Abstract

The formation of Au nanoclusters in MgO using ion implantation and subsequent annealing was investigated. Approximately 1200 and 1400 Au2+ ions/nm2 were implanted in MgO(100) substrates at 300 and 975 K, respectively. Subsequent annealing in air for 10 h at 1275 K promoted the formation of Au nanostructures in MgO. The sample implanted at 300 K showed severe radiation damage. In addition, two-dimensional plateletlike structures with possible composition of Au and MgO were formed during implantation in the sample that was implanted at 300 K. In contrast, Au implantation at 975 K promoted the nucleation of Au nanostructures during implantation. Subsequent annealing of both samples show three-dimensional clusters in MgO. However, the 975 K implanted sample shows clean, high-quality, single-crystal Au clusters that have an epitaxial relationship to MgO(100).

Keywords

Cluster assemblyIon beam analysisTransmission electron microscopy (TEM)
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1311 - 1314
Copyright
Copyright © Materials Research Society 2004

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