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By developing a new in-situ surface modification route, P3HT-SnO2 composite gas sensor with strikingly improved performance was fabricated via modifying the surface of SnO2 porous nanosolid (SnO2 PNS). The experimental results indicate that the sensor fabricated from pristine SnO2 PNS exhibited quite poor sensing performance to NO2 gas. In contrast, when the adsorbed impurity molecules were removed...
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