Multiple sensor array based on pure and surface modified WO3 thin films for e-nose application

C. P. Goyal, N. S. Ramgir, P. K. Sharma, N. Datta, S. Kailasaganapathi, M. Kaur, A. K. Debnath, F. Z. Haque, D. K. Aswal, S. K. Gupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A 2 × 3 sensor array based on pure, Au and CuO modified (two of each kind) WO3 films was fabricated for e-nose application. Effect of surface modification has been investigated and correlated with the observed sensor response values. The sensor array was able to detect H 2S,NH3 and NO selectively based on the sensor response pattern exhibited by the sensor array. WO3 sensor film modified with CuO exhibited a maximum sensitivity towards H2S (S = 92, 10 ppm, 250°C) while pure WO3 films exhibited better sensing characteristics towards NO (S=2.3, 10 ppm, 300°C) and NH3 (S=4.5, 50 ppm, 300°C). The shape of the curve remains unaltered by the change in the concentration of the gas. The shape and position of the combined response curve could be used to determine an unknown gas both qualitatively and quantitatively.

Original languageEnglish
Title of host publicationProceeding of International Conference on Recent Trends in Applied Physics and Material Science, RAM 2013
PublisherAmerican Institute of Physics Inc.
Pages1215-1216
Number of pages2
Volume1536
ISBN (Print)9780735411609
DOIs
Publication statusPublished - 18 Jul 2013
EventInternational Conference on Recent Trends in Applied Physics and Material Science, RAM 2013 - Bikaner, Rajasthan, India
Duration: 1 Feb 20132 Feb 2013

Conference

ConferenceInternational Conference on Recent Trends in Applied Physics and Material Science, RAM 2013
CountryIndia
CityBikaner, Rajasthan
Period1/02/132/02/13

Keywords

  • Electronic nose
  • Gas Sensing
  • Sputtering
  • Surface Modifications
  • Thin Films
  • WO

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