Polymer-dispersed liquid crystal doped with carbon nanotubes for dimethyl methylphosphonate vapor-sensing application

被引：39

作者：

Lai, Yu-Tse ^{[1
]}

Kuo, Jui-Chang ^{[1
]}

Yang, Yao-Joe ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mech Engn, Taipei 10617, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 19期

关键词：

REAL-TIME; SENSOR; RECOGNITION;

D O I：

10.1063/1.4804297

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper proposes a sensitive gas sensor composed of polymer-dispersed liquid crystal (PDLC) for dimethyl methylphosphonate (DMMP) detection. The sensing element comprises a PDLC sensing film doped with carbon nanotubes (CNT-PDLC) and a planar interdigital electrode pair. The concentration of DMMP exposed to the CNT-PDLC material is detectable by measuring the change in conductivity of the material. Compared to conventional LC-based sensors, the proposed PDLC device is robust against mechanical shocks, and can fully operate with a simple read-out circuit. The sensor response is linear for gas concentrations from 5 to 250 ppm, and the response time is approximately 125 s. (C) 2013 AIP Publishing LLC.

引用

页数：3

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