High performance micro CO sensors based on ZnO-SnO2 composite nanofibers with anti-humidity characteristics

Yue, Xue-Jun, Hong, Tian-Sheng, Xiang, Wei, Cai, Kun, and Xu, Xing (2012) High performance micro CO sensors based on ZnO-SnO2 composite nanofibers with anti-humidity characteristics. Chinese Physics Letters, 29 (12). 120702.

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Abstract

ZnO-SnO2 composite nanofibers are synthesized via an electrospinning method and characterized by x-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Micro sensors are fabricated by spinning the nanofibers on Si substrates with Pt signal and heater electrodes. The sensors with small areas (600 μm × 200 μm) can detect CO down to 1ppm at 360 °C. The corresponding sensitivity, response time, and recovery time are 3.2, 6s, and 11s, respectively. Importantly, the sensors can operate at high humidity conditions. The sensitivity only decreases to 2.3 when the sensors are exposed to 1 ppm CO at 95% relative humidity. These excellent sensing properties are due to combining the benefits of one-dimensional nanomaterials and the ZnO-SnO2 grain boundary in the nanofibers.

Item ID: 52206
Item Type: Article (Research - C1)
ISSN: 1741-3540
Date Deposited: 31 Jan 2018 03:31
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090609 Signal Processing @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890104 Mobile Telephone Networks and Services @ 100%
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