화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.22, No.10, 1043-1049, October, 2014
DOI10.1007/s13233-014-2145-3  Export Citation
Preparation of flexible resistive micro-humidity sensors using quaternary ammonium salt-modified graphene oxide and their humidity-sensing properties
Sang-Woo Yun, and Myoung-Seon Gong†
  • Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center, Dankook University, Chungnam, 330-714, Korea
E-mail:
A novel resistive-type micro-humidity sensor was constructed from an interdigitated micro-electrode on a flexible polyimide substrate of size 2.0×3.0 mm2. The humidity-sensing film was composed of a graphene oxide modified with glycidyltrimethylammonium chloride (GO-GTMAC). We investigate the effect of water adsorption on the electrical properties of GO-GTMAC films using the direct current (DC) measurement and alternating current (AC) complex impedance spectroscopy. The micro-humidity sensor was found to have a sensing range of 0.0268 logΩ/%RH, a linearity of R2=0.987, a hysteresis of -1.3±0.2%RH, a response time of 70 s, and a temperature coefficient of 0.50±0.05%RH/°C.
Keywords:polyelectrolyte;modified graphene oxide;micro-humidity sensor;flexible substrate;flexible substrate
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