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Study of ultrathin film of gold nanocomposite polyaniline for CO2 and NH3 gas sensing properties

Published online by Cambridge University Press:  23 October 2012

P.J. Saikia ,
P.C. Sarmah  and
A. Rahman
P.J. Saikia
Affiliation:
CSIR-North-East Institute of Science & Technology, Jorhat 785006, Assam, India
P.C. Sarmah*
Affiliation:
CSIR-North-East Institute of Science & Technology, Jorhat 785006, Assam, India
A. Rahman
Affiliation:
Department of Physics, Gauhati University, Guwahati 781014, Assam, India
*
ae-mail: [email protected]
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Abstract

To study the gas sensing properties for CO2 and NH3 gas, powdered gold nanocomposite polyaniline was chemically synthesized and ultrathin films were fabricated. XRD spectra of these samples indicate the polycrystalline nature of the film. UV-vis spectra showed peak at 3.8 eV corresponding to π-π* transition. The relative sensitivities of the gas to air were around 70 and 530 for CO2 and NH3 gas respectively. Temperature variation of gas conductivity showed the increase of conductivity of the films up to about 42 °C and then decreased for small change of temperature. Recovery time for the sample was 54 s.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 60 , Issue 1 , October 2012 , 10202
Copyright
© EDP Sciences, 2012

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