Chemoresistive conducting polymer-based odour sensors: influence of thickness changes on their sensing properties

被引：25

作者：

Stussi, E ^{[1
]}

Stella, R ^{[1
]}

De Rossi, D ^{[1
]}

机构：

[1] Fac Ingn, Ctr E Piaggio, I-56126 Pisa, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1997年 / 43卷 / 1-3期

关键词：

polymer-based odour sensors; polymer thickness; vapour phase polymerization;

D O I：

10.1016/S0925-4005(97)00147-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Conducting polymer films are widely used in the detection of odours. The change of resistance in the presence of odorants depends on the polymer thickness, and affects the sensitivity properties of the device. Using the vapour phase polymerization technique it is possible to fabricate polymer layers of controllable, uniform thickness. Aiming at the characterization of polymeric sensors as a function of their thickness, we implemented sensors elf different thicknesses and carried out sensitivity measurements using toluene as an analyte, Sensitivity in terms of percentage variation of resistance per unitary odour concentration change was found to decrease with increasing thickness, Data on sensitivity as a function of thickness is presented and a possible explanation is proposed to account for the experimentally observed behaviour, (C) 1997 Elsevier Science S.A.

引用

页码：180 / 185

页数：6

共 11 条

[1] CONDUCTING POLYMER GAS SENSORS .2. RESPONSE OF POLYPYRROLE TO METHANOL VAPOR [J].