Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 122, Issue 2, Pages 357-364Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2006.05.014
Keywords
tin oxide; thick films; doping; surface customization; RuO2 surfactant; gas sensing; gas response; selectivity
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Thick films of pure, RuO2-doped and surface-customized SnO2 were prepared using screen-printing technique. The gas sensing properties of these films were systematically studied. The gas response of surface-ruthenated (surface customized using RuO2) SnO2 is observed to be larger than the responses of pure and RuO2-doped SnO2 to 1000 ppm LPG. The surface species (RuO2) exerts considerable influence on the gas response by modulating the adsorption characteristics. The selectivity for LPG against H-2, NH3, CO2 and H2S gases, response time and recovery time of the sensor were also studied. The results are interpreted. (c) 2006 Elsevier B.V. All rights reserved.
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