Journal
ACS APPLIED NANO MATERIALS
Volume 1, Issue 2, Pages 564-571Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.7b00072
Keywords
proton conduction; polyoxometalate; conductive polymer; humidity sensor
Funding
- University of Macau [SRG2016-00002-FST, CPG2016-00026-FST]
- National Natural Science Foundation of China [51776094, 51406075]
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- Guangdong-Hong Kong joint innovation project [2016A050503012]
- Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province [YQ2015151]
- National Key Research and Development Project funding from the Ministry of Science and Technology of China [2016YFA0202400, 2016YFA0202404, 2016YFB0901600]
- Shenzhen Peacock Team Plan [KQTD2015033110182370]
- Zhejiang Provincial Natural Science Foundation of China [LY18B010001]
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Proton conducting polyoxometalate has received considerable attention because of its unique structural properties. This article reports the fabrication of hybrid polymer films of polypyrrole/polyoxometalate and their resistive-type humidity sensing performance. Hybrid polymer films with different thicknesses were prepared via the coelectrodeposition of free pyrrole monomers with metal oxide clusters. A sensing response of 1.9 s and a recovery time of 1.1 s were exhibited in a 59 nm thick sample at 98% relative humidity and in a sensing range of 11-98% relative humidity. The outstanding sensing in the polypyrrole chain could be ascribed to the synergistic effect of the proton acid doping structure and the oxidation doping structure. The humidity sensor based on the nanocomposite was repeatable even after two months with good response and recovery times.
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