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

Yue, Xue-Jun and Hong, Tian-Sheng and Xiang, Wei and 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). pp. 1-4. ISSN 0256-307X


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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 10 Apr 2013 07:47
Last Modified: 30 Sep 2015 05:07
Uncontrolled Keywords: instrumentation and measurement; condensed matter; structural, mechanical and thermal; nanoscale science; low-D systems
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090605 Photodetectors, Optical Sensors and Solar Cells
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1088/0256-307X/29/12/120702
URI: http://eprints.usq.edu.au/id/eprint/23289

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