1. Enhanced NO2 selectivity of hybrid poly(3-hexylthiophene): ZnO-nanowire thin films.
- Author
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Saxena, Vibha, Aswal, D. K., Kaur, Manmeet, Koiry, S. P., Gupta, S. K., Yakhmi, J. V., Kshirsagar, R. J., and Deshpande, S. K.
- Subjects
THIN films ,NANOWIRES ,SURFACES (Technology) ,NANOSTRUCTURED materials ,THIN films in electrical insulation ,ATMOSPHERIC nitrous oxide - Abstract
Sensing characteristics of the drop-cast thin films of poly(3-hexylthiophene) (P3HT), ZnO nanowires, and P3HT:ZnO-nanowire hybrids with different compositions have been studied for various gases, namely, NO
2 , H2 S, NH3 , CH4 , and CO. At room temperature, pure P3HT and ZnO-nanowire films were highly sensitive to NO2 and H2 S, moderately sensitive to CO, and nearly insensitive to NH3 and CH4 . P3HT:ZnO-nanowire hybrid films, with increasing ZnO-nanowire content, exhibited gradual enhancement in NO2 sensitivity, while reducing sensitivity for H2 S. P3HT:ZnO-nanowire (1:1 ratio by weight) films were found to be highly selective for NO2 . Plausible mechanisms explaining the enhanced NO2 selectivity by hybrid films are discussed. [ABSTRACT FROM AUTHOR]- Published
- 2007
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