Abstract
Sensing behaviors of tin oxide (SnO2)-based gas sensors prepared with various nanomaterials such as nanoparticles, nanochains, flower-like nanoparticles and nanowires were investigated for the detection of a very low concentration of NO2(ppb level). Various SnO2nanomaterials were prepared by the precipitation and thermal evaporation methods. A SnO2 thick film gas sensor fabricated by screen printing method showed a sensor response of about 20%. On the other hands, tin oxide nanowires (TNW) gas sensor synthesized by the thermal evaporation method showed a very high sensor response in the detection of a low concentration of NO2 at 0.1 ppm.
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