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Structural study of amorphous WO3 thin films prepared by the ion exchange method

Published online by Cambridge University Press:  31 January 2011

Tokuro Nanba ,
Yoshio Nishiyama  and
Itaru Yasui
Tokuro Nanba
Affiliation:
Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
Yoshio Nishiyama
Affiliation:
Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
Itaru Yasui
Affiliation:
Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
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Abstract

The structure of amorphous tungsten trioxide films was investigated with IR and Raman spectroscopic analyses and an XRD method. The films were prepared by ion exchange from sodium tungstate as a starting material. Films consisted of microclusters of 10–30 Å diameter, in which the networks are formed with WO6 octahedra sharing their corners and edges. The networks in the as-prepared samples consisted of WO6 units with low symmetry, in which termination by W=O and W—OH2 groups was common. As the post-annealed temperature became higher, the symmetry of WO6 was improved and the edge-sharing octahedra disappeared.

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Articles
Information
Journal of Materials Research , Volume 6 , Issue 6 , June 1991 , pp. 1324 - 1333
Copyright
Copyright © Materials Research Society 1991

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