Humidity-sensing properties of conducting polypyrrole-silver nanocomposites

被引：23

作者：

Kabir, L. ^{[1
]}

Mandal, A. R. ^{[1
]}

Mandal, S. K. ^{[1
]}

机构：

[1] Visva Bharati, Dept Phys, Santini Ketan, W Bengal, India

来源：

JOURNAL OF EXPERIMENTAL NANOSCIENCE | 2008年 / 3卷 / 04期

关键词：

polypyrrole; silver; nanocomposites; humidity sensor;

D O I：

10.1080/17458080802512494

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report here the humidity-sensing characteristics of conducting polypyrrole (PPY)-silver nanocomposites prepared by wet-chemical technique. Addition of silver into the conducting polymer network shows remarkable change in resistance with relative humidity (RH). The resistance of PPY-silver nanocomposites is found to increase with RH till a threshold value, above which the resistance tends to decrease. The threshold RH value is significantly reduced with the increase in silver concentration into the conducting polymer network. The modified metal-polymer interface and the associated interfacial water molecules play the critical role in determining the electrical transport and hence the humidity-response characteristics of the nanocomposites.

引用

页码：297 / 305

页数：9

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