Visible optical sensing of ammonia based on polyaniline film

被引：73
作者：
Lee, YS
Joo, BS
Choi, NJ
Lim, JO
Huh, JS
Lee, DD
机构：
[1] Kyungpook Natl Univ, Sch Elect & Elect Engn, Taegu 702701, South Korea
[2] Kyungpook Natl Univ, Inst Biomed Res, Taegu 702701, South Korea
[3] Kyungpook Natl Univ, Dept Mat Sci & Met, Taegu 702701, South Korea
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 93卷 / 1-3期
关键词：
gas sensor; conductivity; polyaniline;
D O I：
10.1016/S0925-4005(03)00207-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, a new optical gas sensor using thin polymer layers was developed. The polymer sensing layers were synthesized by chemical polymerization using the distilled aniline. The optical property of a polymer as a sensing material was analyzed using UV-Vis-NIR. These layers were prepared using centrifugal force. The polymer layer was uniformly deposited on inner glass pillar. The light source was red-light emitting diode (LED) with a 655 nm wavelength. The light power transmitted through the guide cell was measured with a photodiode. Variation of the light power transmitted was detected when the gas was absorbed into the polymer layer. The transmitted light intensity decreased because gas molecules were absorbed into the polymer layer. This optical sensor showed a good sensitivity to NH3 gas. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：148 / 152
页数：5
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