Epitaxy of Porous and Photocatalytically Active TiO2 Films at 50°C
Gregory K. L. Goh A B , Kelvin Y. S. Chan A , Gao S. Huang A and Qui L. Tay A
+ Author Affiliations
- Author Affiliations
A Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore.
B Corresponding author. Email: g-goh@imre.a-star.edu.sg
Australian Journal of Chemistry 64(9) 1235-1238 https://doi.org/10.1071/CH11163
Submitted: 27 April 2011 Accepted: 15 June 2011 Published: 27 July 2011
Abstract
Epitaxial anatase TiO2 thin films were grown on (001) oriented SrTiO3 single crystal substrates by liquid phase deposition at 50°C. The film consisted of nanosized crystallites and exhibited a significant void fraction of 31 %. This contributed to the cracking of thicker films due to the generation of capillary stresses in the nanosized pores during drying. This porosity also comes in useful during the photodegradation of a methylene blue dye by an as-grown film.
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