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SnO2 nanoparticles and In2O3 nanofibers are synthesized via a sol–gel process and an electrospinning method, respectively. Excellent sensing materials for NH3 detection are achieved by coating SnO2 nanoparticles on In2O3 nanofibers. When the as-prepared sensors were exposed to 1ppm NH3 at room temperature, the response is 21, and the response and recovery times are 7 and 10s, respectively. With this...
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