Journal
BULLETIN OF MATERIALS SCIENCE
Volume 31, Issue 3, Pages 397-400Publisher
SPRINGER
DOI: 10.1007/s12034-008-0062-9
Keywords
Pt-SnO2; gas sensor; LPG; thin film
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In the present study, different catalysts (similar to 10 nm thick) including metals, noble metals and metal oxides, were loaded in dotted island form over SnO2 thin film for LPG gas detection. A comparison of various catalysts indicated that the presence of platinum dotted islands over SnO2 thin film deposited by r.f. sputtering exhibited enhanced response characteristics with a high sensitivity, similar to 742, at an operating temperature of similar to 280 degrees C. Different characterization techniques have been employed such as atomic force microscopy, X-ray diffraction and UV-vis spectroscopy, to study the surface morphology, grain size and optical properties of the deposited thin films. The results suggest the possibility of utilizing the sensor element with the present novel method of catalyst dispersal for the efficient detection of LPG.
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