Articles

Macromolecular Research

, Volume 20, Issue 2, pp 143-146

Gas Sensing performance of composite materials using conducting polymer/single-walled carbon nanotubes

  • Hyang Hee ChoiAffiliated withDepartment of Materials Science and Engineering, Yonsei University
  • , Junmin LeeAffiliated withDepartment of Materials Science and Engineering, Yonsei University
  • , Ki-Young DongAffiliated withDisplay and Nanosystem Laboratory, College of Engineering, Korea University
  • , Byeong-Kwon JuAffiliated withDisplay and Nanosystem Laboratory, College of Engineering, Korea University
  • , Wooyoung LeeAffiliated withDepartment of Materials Science and Engineering, Yonsei University Email author 

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Abstract

We report the fabrication of a novel gas sensor that utilizes electrical resistance changes in electrically conductive polyaniline (PANI) and single-walled carbon nanotube (SWNT) composite materials and its sensing property when NH3 and CO gases co-existed. In addition, we investigated the concentration dependence of electrical properties of the PANI/SWNT composite material at room temperature using real-time monitoring. To improve the gas sensor properties, we deposited PANI using a drop-casting method to warp the PANI surrounding the SWNT. The PANI/SWNT composite material sensors showed a faster response to NH3 gas than CO gas. The CO gas increased the composite conductance, while the NH3 gas had the opposite effect.
http://static-content.springer.com/image/art%3A10.1007%2Fs13233-012-0030-5/MediaObjects/13233_2012_30_Fig1_HTML.gif

Keywords

gas sensors electrical resistance conducting polymer single-walled carbon nanotubes (SWNTs) unsafe gases