期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 267, 期 -, 页码 392-402出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.04.046
关键词
Flexible; Self-powered; Gas sensor; Real-time monitoring; Electronic-skin
资金
- National Natural Science Foundation of China [11674048]
- Fundamental Research Funds for the Central Universities [N170505001, N160502002]
- Liaoning BaiQianWan Talents Program [2014921017]
A flexible self-powered smelling electronic-skin (e-skin) for real-time monitoring the mining environment has been fabricated from piezo-gas-sensor matrix of ZnO-based composite nanowires (NWs) via soft photolithography technique. The e-skin includes four sensing units (relative humidity: bare ZnO NWs, ethanol: Pd/ZnO NWs, hydrogen sulfide: CuO/ZnO NWs, and methane: TiO2/ZnO NWs) and can cross-reactively detect relative humidity (RH), ethanol, hydrogen sulfide (H2S) and methane (CH4) in the surrounding gas atmosphere without external electrical power supply or battery. The e-skin attached on human body can be driven by body motions, and the piezoelectric impulse of the piezo-gas-sensior matrix serves as the power supply. The responses of the four sensing units are 87.76% against 90% RH, 59.82% against 1000 ppm ethanol, 79.27% against 500 ppm H2S and -7.50% against 500 ppm CH4, respectively. High response, selectivity and stability have been achieved from the sensing units. The present results could provoke a possible new research direction for promoting the practical application of flexible self -powered smelling electronic-skin in specific occasion. (C) 2018 Elsevier B.V. All rights reserved.
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