Single polypyrrole nanowire ammonia gas sensor

被引：149
作者：
Hernandez, Sandra C.
Chaudhuri, Debangshu
Chen, Wilfred
Myung, Nosang V. [1 ]
Mulchandani, Ashok
机构：
[1] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA
[2] Univ Calif Riverside, Ctr Nanosci & Engn, Riverside, CA 92521 USA
来源：
ELECTROANALYSIS | 2007年 / 19卷 / 19-20期
关键词：
polypyrrole; nanowires; electrical resistivity; disorder; NH3 gas sensing;
D O I：
10.1002/elan.200703933
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report the synthesis, electrical characterization and ammonia gas sensing with single nanowire of conducting polypyrrole. Three hundred nanometer in diameter and 50 to 60 pm long polypyrrole nanowires were synthesized by chemical polymerization inside SiO2 coated alumina membranes. Temperature dependent electrical resistance studies established that the chemically synthesized nanowires were more ordered compared to electrochemically synthesized nanowires. We further demonstrated that gas sensors based on single polypyrrole nanowire exhibited good sensitivity towards ammonia, and provided a reliable detection at concentration as low as approximately 40 ppm.
引用
收藏
页码：2125 / 2130
页数：6
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