Short communicationGold colloid as applied to the H2S gas sensor
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2013, Sensors and Actuators, B: ChemicalCitation Excerpt :Other passive filters use films of SiO2, Al2O3, Teflon, etc. The thick Al2O3 layers can be used as filters for alcohols in methane sensors [101], the metal-organic pastes can be used as filters for water vapors [102,103], while Teflon is helpful in stopping H2O reaching the sensor. Zirconia can be used at a high temperature for separation of oxygen [104], while platinum and palladium films are gas permeable for hydrogen [105].
Selectivity in semiconductor gas sensors
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2008, Sensors, Chemical and Biochemical Sensors
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