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Journal of Chemistry
Volume 2013, Article ID 579284, 4 pages
http://dx.doi.org/10.1155/2013/579284
Research Article

Cerium Dioxide Thin Films Using Spin Coating

1Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
2School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
3Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Received 22 June 2012; Accepted 23 August 2012

Academic Editor: Roberto Comparelli

Copyright © 2013 D. Channei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cerium dioxide () thin films with varying Ce concentrations (0.1 to 0.9?M, metal basis) were deposited on soda-lime-silica glass substrates using spin coating. It was found that all films exhibited the cubic fluorite structure after annealing at 500°C for 5?h. The laser Raman microspectroscopy and GAXRD analyses revealed that increasing concentrations of Ce resulted in an increase in the degree of crystallinity. FIB and FESEM images confirmed the laser Raman and GAXRD analyses results owing to the predicted increase in film thickness with increasing Ce concentration. However, porosity and shrinkage (drying) cracking of the films also increased significantly with increasing Ce concentrations. UV-VIS spectrophotometry data showed that the transmission of the films decreased with increasing Ce concentrations due to the increasing crack formation. Furthermore, a red shift was observed with increasing Ce concentrations, which resulted in a decrease in the optical indirect band gap.