標題: Effects of Operating Temperature on Droplet Casting of Flexible Polymer/Multi-Walled Carbon Nanotube Composite Gas Sensors
作者: Chiou, Jin-Chern
Wu, Chin-Cheng
Huang, Yu-Chieh
Chang, Shih-Cheng
Lin, Tse-Mei
分子醫學與生物工程研究所
資訊工程學系
電機工程學系
電控工程研究所
Institute of Molecular Medicine and Bioengineering
Department of Computer Science
Department of Electrical and Computer Engineering
Institute of Electrical and Control Engineering
關鍵字: polymer/multi-walled carbon nanotube composites;droplet casting;operating temperature;impedance spectrum
公開日期: 一月-2017
摘要: This study examined the performance of a flexible polymer/multi-walled carbon nanotube (MWCNT) composite sensor array as a function of operating temperature. The response magnitudes of a cost-effective flexible gas sensor array equipped with a heater were measured with respect to five different operating temperatures (room temperature, 40 degrees C, 50 degrees C, 60 degrees C, and 70 degrees C) via impedance spectrum measurement and sensing response experiments. The selected polymers that were droplet cast to coat a MWCNT conductive layer to form two-layer polymer/MWCNT composite sensing films included ethyl cellulose (EC), polyethylene oxide (PEO), and polyvinylpyrrolidone (PVP). Electrical characterization of impedance, sensing response magnitude, and scanning electron microscope (SEM) morphology of each type of polymer/MWCNT composite film was performed at different operating temperatures. With respect to ethanol, the response magnitude of the sensor decreased with increasing operating temperatures. The results indicated that the higher operating temperature could reduce the response and influence the sensitivity of the polymer/MWCNT gas sensor array. The morphology of polymer/MWCNT composite films revealed that there were changes in the porous film after volatile organic compound (VOC) testing.
URI: http://dx.doi.org/10.3390/s17010004
http://hdl.handle.net/11536/133048
ISSN: 1424-8220
DOI: 10.3390/s17010004
期刊: SENSORS
Volume: 17
Issue: 1
顯示於類別:期刊論文