Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 138, Issue 1, Pages 14-20Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.11.057
Keywords
Nanoparticles; Nickel oxide; Gas sensing
Funding
- International Science Programme at Uppsala University
- Spanish Ministry for Science and Education (MEC)
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Nanocrystalline films comprised of NiO particles were prepared by advanced reactive gas evaporation and were investigated for gas sensing applications, specifically for detecting reducing (H2S) and oxidizing (NO2) species. The films were studied in as-deposited state and after annealing at temperatures up to 400,C, and the sensors were operated from room temperature to 325 degrees C. The optimal operating temperature was in the 150-162 degrees C range for H2S and in the 100-125 degrees C range for NO2. We believe that this is the first report of high-sensitivity detection of H2S with NiO-based sensors, as well as the first proof that such sensors can work at room temperature. (C) 2008 Elsevier B.V. All rights reserved.
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