Sensing characteristics of polypyrrole-poly(vinyl alcohol) methanol sensors prepared by in situ vapor state polymerization

被引：74

作者：

Jiang, LS

Jun, HK

Hoh, YS

Lim, JO

Lee, DD

Huh, JS ^{[1
]}

机构：

[1] Kyungpook Natl Univ, Dept Elect, Taegu 702701, South Korea

[2] Kyungpook Natl Univ, Dept Mat Sci & Met, Taegu 702701, South Korea

[3] Kyungpook Natl Univ, Dept Biomed Engn, Taegu 702701, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2005年 / 105卷 / 02期

关键词：

polypyrrole-poly(vinyl alcohol); methanol sensors; in situ vapor state polymerization; FT-Raman spectroscopy;

D O I：

10.1016/j.snb.2003.12.077

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Polypyrrole (PPy)-poly(vinyl alcohol) (PVA) composite and pure polypyrrole methanol sensors were prepared by an in situ vapor state polymerization method and their chemical structures were identified by a FT-Raman spectroscopy. The various electrical sensing behaviors of both types of sensors were systematically investigated by a flow measuring system including mass flow controller (MFC) and bubbling bottle. The incorporation of PVA into the polymer film caused a higher sensitivity than that of pure PPy sensor, while the response and recovery time and long-term stability were worse. The effect of thickness of sensing film was also investigated, and it was found that the thinner film showed higher sensitivity, which indicated that the resistance involved in sensing behavior comes from bulk resistance of sensor rather than surface resistance. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：132 / 137

页数：6

共 29 条

[1] CONDUCTING POLYMER GAS SENSORS .3. RESULTS FOR 4 DIFFERENT POLYMERS AND 5 DIFFERENT VAPORS [J].