Behaviour of electroconductive polyaniline films used in highly sensitive ammonia sensors

Author

Hajdu, F.

Author_Institution

Dept. of Electron. Technol., Budapest Univ. of Technol. & Econ., Hungary

fYear

2002

fDate

2002

Firstpage

216

Lastpage

220

Abstract

Electroconductive polymer based gas sensors have been investigated focusing on the resistance changes when exposing them to an ammonia atmosphere. At first, the resistance increase of these devices in air after manufacturing then, the changes in resistance after exposing them to ammonia of different concentration were examined. These phenomena and also the curing method of the polymer film prepared by electrochemical polymerisation are described and examined here. The main topic of this paper is what kind of problems we must face during signal processing of the responses given by this type of device when designing an accurate concentration measuring system.

Keywords

ammonia; chemical variables measurement; conducting polymers; gas sensors; polymer films; polymerisation; shrinkage; NH₃; chemical model; concentration measuring system; curing method; electrochemical polymerisation; electroconductive polyaniline films; electroconductive polymer based gas sensors; gas sensing mechanism; highly sensitive ammonia sensors; resistance changes; signal processing; Electrodes; Gas detectors; Gases; Gold; Laser beam cutting; Polymer films; Production; Substrates; Temperature sensors; Thin film sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Polymers and Adhesives in Microelectronics and Photonics, 2002. POLYTRONIC 2002. 2nd International IEEE Conference on

Print_ISBN

0-7803-7567-X

Type

conf

DOI

10.1109/POLYTR.2002.1020217

Filename

1020217