• 文献标题:   Differential Structure With Graphene Oxide for Both Humidity and Temperature Sensing
  • 文献类型:   Article
  • 作  者:   LENG XH, LI WN, LUO D, WANG F
  • 作者关键词:   graphene oxide, temperature sensor, humidity sensor, differential structure
  • 出版物名称:   IEEE SENSORS JOURNAL
  • ISSN:   1530-437X EI 1558-1748
  • 通讯作者地址:   Southern Univ Sci Technol
  • 被引频次:   14
  • DOI:   10.1109/JSEN.2017.2712717
  • 出版年:   2017

▎ 摘  要

A graphene oxide (GO)-based sensor with differential structure was designed to detect both humidity and temperature. Two identical units have been fabricated with patterned gold electrodes on which a layer of GO was deposited by the drop-casting or spraying coating method. One unit was then covered by a layer of polydimethylsiloxane to modify its response to the temperature and humidity. Using this differential structure, the sensor shows great linearity in a temperature range from 20 degrees C to 60 degrees C and a humidity range from RH25% to RH95%. The humidity response of the two units varied for three orders of magnitude under the same temperature, which indicates a good sensitivity of the device. We have also found that the spray-coated sensor has a relatively short response and recovery times than the drop-casted one.