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

Hyang Hee Choi, Junmin Lee, Ki Young Dong, Byeong Kwon Ju, Wooyoung Lee

Research output: Contribution to journalArticle

20 Citations (Scopus)

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 NH 3 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 NH 3 gas than CO gas. The CO gas increased the composite conductance, while the NH 3 gas had the opposite effect. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalMacromolecular Research
Volume20
Issue number2
DOIs
Publication statusPublished - 2012 Feb 1

Keywords

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

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

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