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Studies on gas sensing performance of pure and nano- Ag doped ZnO thick film resistors

Lecture Notes in Electrical Engineering, ISSN: 1876-1100, Vol: 49 LNEE, Page: 293-307
2009
  • 10
    Citations
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    Usage
  • 6
    Captures
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    Mentions
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    6

Conference Paper Description

Thick films of AR grade ZnO were prepared by screen-printing technique. The gas sensing performances of thick films were tested for various gases. It showed maximum sensitivity to CO gas at 100 °C for 100ppm gas concentration. To improve the sensitivity and selectivity of the film towards a particular gas, ZnO thick films were surface modified by dipping them in a solution of nano silver for different intervals of time. These surface modified ZnO films showed larger sensitivity to HS gas (100ppm) than pure ZnO film at 300 °C. Nano silver on the surface of the film shifts the reactivity of film from CO to HS gas. A systematic study of sensing performance of the sensor indicates the key role-played by the nano silver species on the surface.The sensitivity, selectivity, response and recovery time of the sensor were measured and presented. © 2009 Springer-Verlag Berlin Heidelberg.

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