Humidity sensors using in situ synthesized sodium polystyrene sulfonate/ZnO nanocomposites

被引：121

作者：

Li, Y ^{[1
]}

Yang, MJ ^{[1
]}

She, Y ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China

来源：

TALANTA | 2004年 / 62卷 / 04期

关键词：

humidity sensor; humidity sensitive property; organic/inorganic nanocomposite; sodium polystyrenesulfonate; ZnO;

D O I：

10.1016/j.talanta.2003.09.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Thin film humidity sensors have been prepared using in situ synthesized inorganic/organic nanocomposites of sodium polystyrenesuffonate (NaPSS) and ZnO. Its humidity sensing characteristics and the sensing mechanism have been investigated by measuring the complex impedance spectra of the sensor at different humidities. The logarithm of the impedance of sensor based on composite film changes linearly by four-orders of magnitude over almost whole humidity range (11-97% RH). Furthermore, the sensor exhibits a quick response (absorption: 2 s, desorption: 2 s) and small hysteresis (less than 2% RH). The composite film shows better sensing properties than NaPSS film, such as better linearity, quicker response. Explanation to the improvement is attempted by taking into account of the composition and structure of the nanocomposites. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：707 / 712

页数：6

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