期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 258, 期 -, 页码 857-869出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.11.160
关键词
Al/Ag-carbon nanofiber; Porous PDMS; Triboelectrification; Acetylene sensor; Less humidity effect
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2014R1A2A2A01002668]
We report a self-powered active gas sensor that can detect acetylene (C2H2) reliably and accurately by measuring the output voltages generated during contact electrification between bimetallic Al/Ag-carbon nanofiber (CNF) network and porous PDMS friction surfaces. Upon exposure to certain concentrations of C2H2, the triboelectric charging behavior of the sensor is altered due to a surface reaction between C2H2 molecules and the Al/Ag-CNF friction layer. The sensor exhibits excellent sensitivity of 83% and a quickresponse time of 88 s to C2H2 gas at a concentration of 1000 ppm. Importantly, the friction surfaces exhibit high hydrophobicity, which preferentially minimizes the influence of humidity and provides superior sensing performance even in a high humidity atmosphere (similar to 87% relative humidity). We believe that the proposed approach for harvesting energy and sensing can be advantageous in practical applications and will stimulate new research for the development of high performance, precise, reliable, and durable self-powered active gas sensors that can operate in hostile environments. (c) 2017 Elsevier B.V. All rights reserved.
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