HIGH-FREQUENCY AC INVESTIGATION OF CONDUCTING POLYMER GAS SENSORS

被引：30

作者：

MUSIO, F ^{[1
]}

AMRANI, MEH ^{[1
]}

PERSAUD, KC ^{[1
]}

机构：

[1] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT INSTRUMENTAT & ANALYT SCI,MANCHESTER M60 1QD,LANCS,ENGLAND

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 23卷 / 2-3期

关键词：

CONDUCTING POLYMERS; GAS SENSORS; HIGH-FREQUENCY AC MEASUREMENTS;

D O I：

10.1016/0925-4005(94)01283-N

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Conducting organic polymers may be used for the detection of vapours and gases. A new development is the interrogation of conducting polymer sensors using high-frequency a.c. measurements. This new gas-sensing technique needs investigation of the electrical behaviour at high frequency (1 MHz-1 GHz) of a number of organic conducting polymers. A sensor prototype consisting of two straight parallel copper strips on a fibreglass substrate and a polypyrrole (PPY) layer deposited between them is used for this purpose. A mathematical model of this prototype has been developed using transmission-line theory for modelling its response over the frequency range 1 MHz-1 GHz. The model permits one to obtain the input sensor impedance versus frequency when the PPY complex permittivity (versus frequency, temperature, humidity, gas concentration, etc.) is known, and vice versa.

引用

页码：223 / 226

页数：4

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