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Structure and Bonding of Metallic Nanowires Prepared in Nanoporous Alumina Membranes Studied by EXAFS, XANES and HED

Published online by Cambridge University Press:  21 March 2011

M. Kröll ,
R. E. Benfield ,
J. C. Dore ,
D. Grandjean  and
G. Schmid
M. Kröll
Affiliation:
Physics Department, Trinity College Dublin, Dublin 2, Ireland
R. E. Benfield
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, CT2 7NR, United Kingdom
J. C. Dore
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, CT2 7NR, United Kingdom
D. Grandjean
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, CT2 7NR, United Kingdom
G. Schmid
Affiliation:
Institut für Anorganische Chemie, Universität GH Essen, Universitätsstr. 5-7, 45117 Essen, Germany
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Abstract

The structural properties of metallic nanowires prepared within the pores of nanoporous alumina membranes are investigated using EXAFS, XANES and High Energy X-Ray Diffraction (HED). Gold, silver, copper and iron nanowires show the same structure and atom-atom distances as the corresponding bulk metals. The structural properties of these metals do not change if the wire diameter is varied. Cobalt nanowires, however, show a size dependent mixture of fcc and hcp phases. The amount of fcc-Co, which in the bulk is only known as a high temperature modification, increases with decreasing wire diameter. This leads to interesting changes in the magnetic properties of Co nanowires.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 678: Symposia EE – Applications of Synchrotron Radiation Techniques…IV , 2001 , EE6.1.1
Copyright
Copyright © Materials Research Society 2001

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