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Enhanced H2S sensing characteristics of Pt doped SnO2 nanofibers sensors with micro heater |
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| Authors: | Ki-Young DongAuthor VitaeJoong-Ki ChoiAuthor Vitae In-Sung HwangAuthor VitaeJin-Woo LeeAuthor Vitae Byung Hyun KangAuthor VitaeDae-Jin HamAuthor Vitae Jong-Heun LeeAuthor VitaeByeong-Kwon JuAuthor Vitae |
| Affiliation: | a Display and Nanosystem Laboratory, College of Engineering, Korea University, Seoul 136-713, Republic of Korea b Department of Materials Science and Engineering, College of Engineering, Korea University, Seoul 136-713, Republic of Korea c Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 130-701, Republic of Korea |
| Abstract: | Gas sensors were designed and fabricated using oxide nanofibers as the sensing materials on micro platforms using micromachining technology. Pure and Pt doped SnO2 nanofibers were prepared by electrospinning and their H2S gas sensing characteristics were subsequently investigated. The sensing temperatures of 300 and 500 °C could be attained at the heater powers of 36 and 94 mW, respectively, and the sensors showed high and fast responses to H2S. The responses of 0.08 wt% Pt doped SnO2 nanofibers to 4-20 ppm H2S, were 25.9-40.6 times higher than those of pure SnO2 nanofibers. The gas sensing characteristics were discussed in relation to the catalytic promotion effect of Pt, nano-scale morphology of electrospun nanofibers, and sensor platform using micro heater. |
| Keywords: | SnO2 nanofibers Micro heater Gas sensors Pt-SnO2 H2S sensors |
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