Gas sensors for ammonia detection based on polyaniline-coated multi-wall carbon nanotubes

被引：106

作者：

He, Lifang ^{[1
,2
]}

Jia, Yong ^{[1
,3
]}

Meng, Fanli ^{[1
,2
]}

Li, Minqiang ^{[1
]}

Liu, Jinhuai ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Hefei Inst IntelligMachines, Key Lab Biomimet Sensing & Adv Robot Technol, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China

[3] Anhui Univ Tradit Chinese Med, Dept Pharm, Hefei 230031, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2009年 / 163卷 / 02期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Conducting polymer; Carbon nanotube; Uniform coating; Sensor; Ammonia; NO2;

D O I：

10.1016/j.mseb.2009.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyaniline-coated multi-wall carbon nanotubes (PANI-coated MWNTs) were prepared by in situ polymerization method. Field emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and thermogravimetric analysis were used to characterize the as-prepared PANI-coated MWNTs. Obtained results indicated that PANI was uniformly coated on MWNTs, and the thickness of the coatings can be controlled by changing the weight ratios of aniline monomer and MWNTs in the polymerization process. Sensors were fabricated by spin-coating onto pre-patterned electrodes, and ammonia gas sensing properties of the as-prepared PANI-coated MWNTs were studied. The results showed a good response and reproducibility towards ammonia at room temperature. In addition, PANI-coated MWNTs exhibited a linear response to ammonia in the range of 0.2-15 ppm. The effects of the thickness of PANI coatings on the gas sensing properties were also investigated in detail. The results suggest a potential application of PANI-coated MWNTs in gas sensor for detecting ammonia. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：76 / 81

页数：6

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