Abstract
A novel ceramic nanowires of TiO 2 and poly(2-acrylamido-2-methylpropane sulfonate) (TiO 2 NWs/PAMPS) composite material films coated on quartz crystal microbalance (QCM) was prepared as a low humidity sensor. The 50 wt.% of TiO 2 NWs/PAMPS composite material films showed excellent sensitivity (2.63 −ΔHz/Δppm v) at 31.5 ppm v), linearity ( R 2 = 0.9959) and acceptable response time (64 s at 34.6 ppm v). The low humidity sensing mechanism was discussed in terms of surface texture and nanostructured morphology of the composite materials. Moreover, the adsorption dynamic analysis, molecular mechanics calculation (association constant), was used to elucidate the effect of adding 50 wt.% TiO 2 NWs into PAMPS in the increased sensitivity of low humidity sensing.
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