摘要
ZnO-SnO_(2) 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(600μm×200μm)can detect CO down to 1 ppm at 360℃.The corresponding sensitivity,response time,and recovery time are 3.2,6 s,and 11 s,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-SnO_(2) grain boundary in the nanofibers.
作者
岳学军
洪添胜
向伟
蔡坤
徐兴
YUE Xue-Jun;HONG Tian-Sheng;XIANG Wei;CAI Kun;XU Xing(Key Laboratory of Key Technology on Agricultural Machine and Equipment(Ministry of Education),Engineering College,South China Agricultural University,Guangzhou 5106422Faculty of Engineering and Surveying,University of Southern Queensland,Toowoomba QLD 4350,Australia)
基金
Supported by the Special Fund for Agro-scientific Research in the Public Interest of China(No 200903023)
Science and Technology Projects in Guangdong Province(2010B020314007)
the Cooperation Projects of Industry,Education and Academy Sponsored by Guangdong Province and Ministry(2011B090400359).
