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Ammonia gas detection based on polyaniline nanofibers coated on interdigitated array electrodes

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Abstract

Ammonia gas sensors were fabricated from polyaniline nanofibers, which were synthesized by a simple dilute polymerization method without external template. The films of polyaniline nanofibers were deposited on interdigitated array electrodes by drop casting method. The ammonia gas sensing mechanism arises from the deprotonation process of acid doped polyaniline. The sensors exhibited the sensitivity of 1.06 and response time of 10 s for 50 ppm of ammonia gas. Such high sensitivity and fast response are attributed to the large surface-to-volume ratio and interconnected network structures. These results suggest that polyaniline nanofibers are promising materials for ammonia gas sensors with high performance.

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Acknowledgments

This work was partly supported from “973” National Key Basic Research Program of China (Grant No. 2007CB310500), Chinese Ministry of Education (Grant No. 705040), and National Natural Science Foundation of China (Grant No. 90606009).

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Correspondence to Taihong Wang.

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Du, Z., Li, C., Li, L. et al. Ammonia gas detection based on polyaniline nanofibers coated on interdigitated array electrodes. J Mater Sci: Mater Electron 22, 418–421 (2011). https://doi.org/10.1007/s10854-010-0152-5

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  • DOI: https://doi.org/10.1007/s10854-010-0152-5

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