Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 123, Issue 2, Pages 1113-1119Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2006.11.028
Keywords
sensor hydrogen sulfide; nitrogen dioxide; sensitive properties; mechanism; [Cu-5(bipyO(2))(6)Cl-8]Cl-2
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In this work, the thick film sensors were produced from [Cu-5(bipyO(2))(6)Cl-8]Cl-2 and their gas sensing properties were studied. It was found that the sensors not only had high responses to above 0.013% NO2 and above 0.017% H2S at room temperature, but also had favorable gas distinguishability. The response and recovery time were about 8 s and 10 s to H2S, respectively, but they were about 8 s and 12 s to NO2. The sensor also had good consistency and reproducibility. This is the first report of room temperature sensing of a metal complex to NO2 and H2S. It was demonstrated by theoretic analysis that the sensing mechanism was explained by using a double energy valley model. The calculated values and experimental data were in good agreement with each other. (C) 2006 Elsevier B.V. All rights reserved.
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