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A facile fabrication route to tungsten oxide films on ceramic substrates

A facile fabrication route to tungsten oxide films on ceramic substrates

Authors :
In-Su Kang
Seung-Wan Song
Source :
Sensors and Actuators B: Chemical. 129:971-976
Publication Year :
2008
Publisher :
Elsevier BV, 2008.

Abstract

Crystalline films of WO3 were directly fabricated on alumina and zirconia ceramic substrates via a facile hydrothermal fabrication process using an aqueous peroxy-tungstate solution. The process utilized kinetically controlled decomposition reaction of the peroxy-tungstate solution to tungsten oxide following supersaturation and heterogeneous nucleation at the surface of the substrates. The films possessed remarkably different microstructures depending on the reaction conditions, but all particles were oriented normal to the substrates. X-ray diffraction, transmission electron microscopic and Raman spectroscopic data indicated that the WO3 film had a hexagonal structure and film orientation. The WO3 films showed a rapid gas response to NO2 of ppm level. The data contribute to the development of film fabrication methods of a variety of oxide gas sensing elements.

Details

ISSN :
09254005
Volume :
129
Database :
OpenAIRE
Journal :
Sensors and Actuators B: Chemical
Accession number :
edsair.doi...........b841a571a6ab0f7466311e47cf4a49f4
Full Text :
https://doi.org/10.1016/j.snb.2007.10.042