Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 49, Pages 55056-55063Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c15585
Keywords
wearable; NH3 sensor; super-rapid; neural network; Au/polypyrrole
Funding
- National Natural Science Foundation of China [51774245, 24174057, 52073238]
- Fok Ying Tung Education Foundation [161103]
- Open Funds of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploration [PLN201806, PLN201926]
- Southwest Petroleum University
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Wearable conducting polymer-based NH3 sensors are highly desirable in real-time environmental monitoring and human health protection but still a challenge for their relatively long response/recovery time and moderate sensitivity at room temperature. Herein, we present an effective route to fulfill this challenge by constructing porous and neural network-like Au/polypyrrole (Au/PPy) electrospun nanofibrous film with hollow capsular units for NH3 sensor. Taking the unique architecture and synergistic effect between Au and PPy, our sensor exhibits not only super-rapid response/recovery time (both similar to 7 s), faster than all reported sensors, but also stable and ultrahigh sensitivity (response reaches similar to 2.3 for 1 ppm NH3) at room temperature even during repeated deformation. Furthermore, good selectivity has been also achieved. These outstanding properties make our sensor hold great potential in real-time NH3-related disease diagnosis and environmental monitoring at room temperature.
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