Gas Sensing performance of composite materials using conducting polymer/single-walled carbon nanotubes
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- Choi, H.H., Lee, J., Dong, KY. et al. Macromol. Res. (2012) 20: 143. doi:10.1007/s13233-012-0030-5
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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.
Keywordsgas sensors electrical resistance conducting polymer single-walled carbon nanotubes (SWNTs) unsafe gases
© The Polymer Society of Korea and Springer Netherlands 2012