Novel Fabrication of Conductive Polymers Contained Micro-Array Gas Sensitive Films Using A Micromanipulation Method

H. S. Jung, Toshinori Shimanouchi, S. Morita, R. Kuboi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A novel method for fabricating a micro gas sensor film on an indium tin oxide (ITO) electrode patterned using micro-machining technology was developed. A micromanipulation system equipped with a counter electrode (Au; Ø10 μm) and a microsyringe, which was connected to a microinjection system, was first constructed. With this system, micro gas sensor arrays could be successfully prepared on ITO electrodes. Two kinds of micro gas sensor films were prepared, based on polythiophene (PTh) and poly(3-n-dodecylthiophene) (PD). The response behavior of conventional PTh and micro-PTh films against NH 3 at three different operating temperatures (25, 40 and 60°C) was investigated by measuring the resistance of the film. With the micro-PTh film, a reversible response was observed against NH3 when measured at 40 and 60 °C. In addition, the responsive characteristics of the microsensor films against different testing gases were examined at the three operating temperatures. The resistance of the microsensor films of PTh and PD changed considerably, depending on the type of testing gas, allowing these sensor films to be used for the detection of various gases. Furthermore, the microsensor films had a high stability compared with conventional films prepared from the same polymer.

Original languageEnglish
Pages (from-to)1453-1459
Number of pages7
JournalElectroanalysis
Volume15
Issue number18
DOIs
Publication statusPublished - Oct 2003
Externally publishedYes

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Keywords

  • Micromanipulation
  • Microsensor array
  • Odor gas
  • Poly(3-n-dodecylthiophene)
  • Polythiophene
  • Reversibility

ASJC Scopus subject areas

  • Analytical Chemistry

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