Polyaniline nanowires-gold nanoparticles hybrid network based chemiresistive hydrogen sulfide sensor

被引:162
作者
Shirsat, Mahendra D. [1 ]
Bangar, Mangesh A. [1 ]
Deshusses, Marc A. [1 ]
Myung, Nosang V. [1 ]
Mulchandani, Ashok [1 ]
机构
[1] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA
基金
美国国家卫生研究院;
关键词
conducting polymers; electrochemical electrodes; gas sensors; gold; hydrogen compounds; nanoparticles; nanowires; organic-inorganic hybrid materials; polymerisation; voltammetry (chemical analysis); microfabrication; CHEMICAL SENSORS; GAS SENSOR; FILM; POLYMERS; H2S; ARRAYS;
D O I
10.1063/1.3070237
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report a sensitive, selective, and fast responding room temperature chemiresistive sensor for hydrogen sulfide detection and quantification using polyaniline nanowires-gold nanoparticles hybrid network. The sensor was fabricated by facile electrochemical technique. Initially, polyaniline nanowires with a diameter of 250-320 nm bridging the gap between a pair of microfabricated gold electrodes were synthesized using templateless electrochemical polymerization using a two step galvanostatic technique. Polyaniline nanowires were then electrochemically functionalized with gold nanoparticles using cyclic voltammetry technique. These chemiresistive sensors show an excellent limit of detection (0.1 ppb), wide dynamic range (0.1-100 ppb), and very good selectivity and reproducibility.
引用
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页数:3
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