期刊
SENSORS
卷 18, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/s18093113
关键词
VOC; gas sensor; PEG; MWCNTs; room temperature
资金
- Shenzhen Science and Technology Research and Development Funds [JCYJ20160411164305110, JCYJ20150831192244849]
- National High Technology Research and Development Plan of China [2015AA043505]
Sensitive detection of volatile organic compounds (VOCs) is significant for environmental monitoring and medical applications. In this work, multi-walled carbon nanotubes (MWCNTs) and polyethylene glycol (PEG) that have good adsorption for VOCs, were sprayed layer by layer on an interdigitated electrode (IDE) to build a sensitive VOCs gas sensor. The relative resistance change (oR/R) when the sensor was exposed to VOCs was measured. The sensor showed high sensitivity to acetone, ethanol, isopropanol and isoprene with fast response (110 +/- 5 s) and recovery (152 +/- 5 s) at room temperature, and the lower detection limit (LDL) of the sensor reached 9 ppm. With the micro-fabricated IDE structure, the sensor can be easily built into an electric nose for VOC recognition and measurement.
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