文献类型：期刊文献

英文题名：Fabrication and Characterization of Amino Group Functionalized Multiwall Carbon Nanotubes (MWCNT) Formaldehyde Gas Sensors

作者：Mu, Haichuan[1];Wang, Keke[1];Zhang, Shicheng[1];Shi, Keyi[1];Sun, Shaochi[1];Li, Zhi[1];Zhou, Jia[2];Xie, Haifen[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Sch Sci, Shanghai 200237, Peoples R China;[2]Fudan Univ, Microelect Dept, Applicat Specif Integrated Circuit & Syst State K, Shanghai 200433, Peoples R China

年份：2014

卷号：14

期号：7

起止页码：2362

外文期刊名：IEEE SENSORS JOURNAL

收录：;EI(收录号：20142417820098);WOS:【SCI-EXPANDED(收录号:WOS:000342843100021)】；

基金：This work was supported in part by the China University Students' Research Program and in part by the System State Key Laboratory of China, Fudan University. The associate editor coordinating the review of this paper and approving it for publication was Prof. Perena I. Gouma. (Corresponding author: H. Xie.)

语种：英文

外文关键词：MWCNT; gas sensor; amino group functionalized; characterization

摘要：Multiwall carbon nanotubes (MWCNTs) formaldehyde gas sensors functionalized with amino group were fabricated on interdigitated electrodes and the effects of the amount of amino group functionalized, sensing layer thickness, operating temperature, and humidity on the sensors sensitivity were investigated. The MWCNTs sensors with the optimal amount of 18.19 wt% amino group functionalized showed superior sensitivity at the formaldehyde concentration as low as 20 ppb. The optimal operation temperature for the sensor was found to be 22 degrees C, which is advantageous for real applications. The sensors sensitivity deteriorated with the increase of sensing layers thickness. The sensor with the sensing layer thickness of 8.1 mu m was demonstrated to possess the optimal combination of sensitivity and reproducibility. The mechanisms by which the sensors sensitivity depended on the amount of amino group functionalized, sensitive layers thickness, operating temperature, and humidity were discussed.