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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
- 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.
- Subjects :
- Supersaturation
Aqueous solution
Fabrication
Materials science
Metals and Alloys
Nucleation
Oxide
Nanotechnology
Condensed Matter Physics
Microstructure
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
symbols.namesake
chemistry
Chemical engineering
visual_art
Materials Chemistry
visual_art.visual_art_medium
symbols
Ceramic
Electrical and Electronic Engineering
Raman spectroscopy
Instrumentation
Subjects
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