Large-scale fabrication of highly sensitive SnO₂ nanowire network gas sensors by single step vapor phase growth

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• 作者：In-Sung Hwang^a  ; [Author Vitae] ; Sun-Jung Kim^a  ; [Author Vitae] ; Joong-Ki Choi^a  ; [Author Vitae] ; Jong-Jin Jung^b  ; [Author Vitae] ; Do Joon Yoo^b  ; [Author Vitae] ; Ki-Young Dong^c  ; [Author Vitae] ; Byeong-Kwon Ju^c  ; [Author Vitae] ; Jong-Heun Lee^a ; ^{leejongheun@gmail.com} ; ^{jongheun@korea.ac.kr}  ; [Author Vitae]
• 关键词：SnO2 nanowire ; Gas sensors ; Large-scale fabrication ; NO2 ; C2H5OH
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：April, 2012
• 卷：165
• 期：1
• 页码：97-103
• 文件大小：1257 K

摘要

The SnO₂ nanowire networks were grown on a laser-scribed Al₂O₃ substrate containing 16 sensor elements with Au electrodes and Pt heaters via a single step vapor phase reaction, and their gas sensing characteristics were studied. The sensor showed a high response to 5 ppm NO₂ (R_g/R_a = 1909, R_g: resistance in gas, R_a: resistance in air) at the sensor temperature of 141 掳C and high and selective responses to 100 ppm C₂H₅OH (R_a/R_g = 301.8-326.4) at 240 and 296 掳C, which demonstrated that high performance SnO₂ nanowire network gas sensors can be fabricated on a large scale through a facile and cost-effective route.