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Micro-sensors are fabricated by co-electrospinning In2O3and SnO2nanofibers on the substrates of SiO2/Si with interdigitated Pt signal electrodes.The total sensor area is 1.36 mm 9 0.55 mm and the active area is only0.63 mm 9 0.55 mm.Excellent NH3sensing properties are obtained based on the sensors at room temperature.The sensitivity is at most 28 when the sensors are exposed to NH3of 10 ppm.The response time is 8 s or so and the recovery time is nearly 2 s.Not only fine selectivity,but also longtime stability is obtained.The results not only demonstrate the obtained micro-sensors are very promising devices for NH3detection,but also show a possible route for large-scale NH3sensor fabrication at the industrial level.
Micro-sensors are manufactured by co-electrospinning In2O3 and SnO2 nanofibers on the substrates of SiO2 / Si with interdigitated Pt signal electrodes. The total sensor area is 1.36 mm 9 0.55 mm and the active area is only 0.63 mm 9 0.55 mm. Excellent NH3 sensing properties are obtained based on the sensors at room temperature. sensitivity is at most 28 when the sensors are exposed to NH3of 10 ppm. the response time is 8 s so so and the recovery time is nearly 2 s. Not only fine selectivity but but also longtime stability is obtained. The results not only demonstrated the obtained micro-sensors are very promising devices for NH3detection, but also show a possible route for large-scale NH3sensor fabrication at the industrial level.