The effect of humidity on the electrical behavior of a cationic conjugated polyelectrolyte based on poly(phenylene vinylene)

被引：12
作者：
Liu, Kuan [1 ,2 ]
Li, Yang [1 ,2 ]
Zhang, Guoqiang [1 ,2 ]
Lv, Xin [1 ,2 ]
Yang, Mujie [1 ,2 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Minist Educ, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 135卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Cationic conjugated polyelectrolyte; Poly(phenylene vinylene); Humidity sensitivity; Humidity sensor; TRANSPORT PROPERTIES; SENSITIVE PROPERTIES; CONDUCTING POLYMER; IONIC-STRENGTH; DNA DETECTION; THIN-FILM; FLUORESCENCE; SENSOR; AGGREGATION; MECHANISM;
D O I：
10.1016/j.snb.2008.09.052
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A cationic Conjugated polymer based on poly(phenylene vinylene) was prepared by Glich dehydrohalogenation polymerization. The structure of the polymer was characterized by H-1 NMR, Fourier transformed infrared spectroscopy, UV-visible spectroscopy. photoluminescent spectroscopy and thermogravimetric analysis. The polymer was deposited on interdigitated gold electrodes by dip-coating, and its electrical responses to humidity were investigated at room temperature over the range of 22-97%RH. It was found that the polymer exhibited a high sensitivity, as characterized by impedance change almost linearly on a semi-logarithmic scale from 10(7) to 10(4) Omega when humidity decreased from 22 to 97%RH. In addition, fast response (t(90%) similar to 7 s and similar to 5 s for absorption and desorption, respectively) and moderate hysteresis (similar to 6%RH) were observed. It is proposed that both the pendant ionic group of the cationic conjugated polymer and the pi-conjugated backbone affected its humidity sensing behaviors. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：597 / 602
页数：6
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