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Open Access Publications from the University of California

A layered surface acoustic wave gas sensor based on a polyaniline/In2O3 nanofibre composite

  • Author(s): Sadek, A Z
  • Wlodarski, W
  • Shin, K
  • Kaner, Richard B
  • Kalantar-zadeh, K
  • et al.

A polyaniline/In2O3 nanofibre composite based layered surface acoustic wave ( SAW) sensor has been developed and investigated for different gases. Chemical oxidative polymerization of aniline in the presence of finely divided In2O3 was employed to synthesize a polyaniline nanofibre/In2O3 nanoparticle composite. The nanocomposite was deposited onto a layered ZnO/64 degrees YX LiNbO3 SAW transducer. The novel sensor was exposed to H-2, NO2 and CO gases. Fast response and recovery times with good repeatability were observed at room temperature.

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