Novel array-type gas sensors using conducting polymers, and their performance for gas identification

Yoshiaki Sakurai, Ho Sup Jung, Toshinori Shimanouchi, Takao Inoguchi, Seiichi Morita, Ryoich Kuboi, Kazuki Natsukawa

Research output: Contribution to journalConference article

50 Citations (Scopus)

Abstract

Novel gas sensor devices have been developed using polythiophene (pTh) film and poly(3-n-dodecylthiophene) (pDpTh) film coated over pTh film. These polymer films were electrochemically deposited and doped by cyclic voltammetry on thin-film electrodes where the isolation gap was formed by a micromachining process. We examined the response characteristics of the conducting polymer films against various sample gases over a range of temperatures of the sensitive layer. The resistance changes of both sensitive layers of pTh and pDpTh were highly dependent on the kind of layer. In particular, pTh film responded to ammonia gas and pDpTh films clearly responded to hydrophobic gases, such as chloroform, methane and ethanol. The response of these films to several gases was analyzed with a pattern recognition (PARC) algorithm. It was found that our simple gas sensor device could discriminate between the gases that were used here.

Original languageEnglish
Pages (from-to)270-275
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume83
Issue number1-3
DOIs
Publication statusPublished - Mar 15 2002
EventSelected papers from Transduckers '01 Eurosensors XV (Transduckers 2001) - Munich, Germany
Duration: Jun 10 2001Jun 14 2001

Keywords

  • Gas sensor
  • Hydrophobic effect
  • Pattern recognition algorithm
  • Polythiophene and poly(3-n-dodecylthiphene)
  • Swelling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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