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Enhanced response characteristics of SnO2 thin film loaded with nanoscale catalytic clusters for Methane gas

Published online by Cambridge University Press:  03 March 2011

Divya Haridas ,
Arijit Chowdhuri ,
K. Sreenivas  and
Vinay Gupta
Divya Haridas
Affiliation:
Dept. of Physics and Astrophysics, University of Delhi, Delhi, India Keshav Mahavidyalaya, Pitampura, University of Delhi, India
Arijit Chowdhuri
Affiliation:
Acharya Narendra Dev College, Govindpuri, University of Delhi, India
K. Sreenivas
Affiliation:
Dept. of Physics and Astrophysics, University of Delhi, Delhi, India
Vinay Gupta
Affiliation:
Dept. of Physics and Astrophysics, University of Delhi, Delhi, India
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Abstract

In recent years, an increase in usage of methane gas in household and automobile industry has been observed. Detection of methane is always a great cause of concern for safety at home or automobile industries, productions in mines and chemical factories. This paper reports the response characteristics of rf-sputtered SnO2 thin films (90 nm thin) loaded with nanoscale catalytic clusters for detection of methane. Ultrathin (8 nm) metal and metal-oxide catalysts (Pt, Ag, Ni, Pd, Au, NiO, Au2O3) clusters are loaded over the surface SnO2 thin film. The SnO2-Pd cluster structure is found to exhibit an enhanced response (97.2%) for 200 ppm of methane at a relatively low operating temperature (220oC). The enhanced response is shown to be primarily due to the dominant roles played by both Fermi level energy control mechanism and spillover mechanism.

Keywords

Pdfilmmethane
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1303: Symposium Y – Nanomaterials Integration for Electronics, Energy and Sensing , 2011 , mrsf10-1303-y10-25
Copyright
Copyright © Materials Research Society 2011

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References

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