Preparation of layered organic-inorganic nanohybrid thin films of molybdenum trioxide with polyaniline derivatives for aldehyde gases sensors of several tens ppb level

Toshio Itoh, Ichiro Matsubara, Woosuck Shin, Noriya Izu, Maiko Nishibori

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

The present study is an investigation of the aldehyde gas sensing property of MoO3 with polyaniline (PANI) or poly(o-anisidine) (PoANIS) thin films, which are one of the layered organic-inorganic hybrids. The (PANI)xMoO3 and (PoANIS)xMoO3 hybrid thin films are formed by a modified intercalation process. A sodium molybdenum oxide ([Na(H2O)2]xMoO3) thin film is soaked in an intercalation solution, i.e. PANI or PoANIS solution, which is synthesized by polymerization of aniline or o-anisidine hydrochloride in a water solution. In this modified process, the intercalation solutions are filtrated in order to remove insoluble polymers possessing a high-polymerization degree. The (PANI)xMoO3 and (PoANIS)xMoO3 hybrid thin films prepared by the modified process can exhibit excellent response of a resistance increase when exposed to formaldehyde and acetaldehyde of several tens ppb because insoluble PANI or PoANIS impurities possessing opposite response of resistance decreases against the hybrids are prevented adsorbing onto the surfaces of the hybrid thin films.

Original languageEnglish
Pages (from-to)512-520
Number of pages9
JournalSensors and Actuators, B: Chemical
Volume128
Issue number2
DOIs
Publication statusPublished - Jan 15 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • 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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