A polyaniline/In 2 O 3 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 In 2 O 3 was employed to synthesize a polyaniline nanofibre/In 2 O 3 nanoparticle composite. The nanocomposite was deposited onto a layered ZnO/64° YX LiNbO 3 SAW transducer. The novel sensor was exposed to H 2 , NO 2 and CO gases. Fast response and recovery times with good repeatability were observed at room temperature.
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Sadek et al. (2006) studied this question.
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