Novel array-type gas sensors using conducting polymers, and their performance for gas identification

Novel gas sensor devices have been developed using polythiophene (pTh) film and poly(3-n-dodecylthiophene) (pDpTh) film coated over pTh film. These polymer films were electrochemically deposited and doped by cyclic voltammetry on thin-film electrodes where the isolation gap was formed by a micromach...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2002-03, Vol.83 (1-3), p.270-275
Main Authors: Sakurai, Yoshiaki, Jung, Ho-Sup, Shimanouchi, Toshinori, Inoguchi, Takao, Morita, Seiichi, Kuboi, Ryoich, Natsukawa, Kazuki
Format: Article
Language:English
Subjects:
Gas sensor
Hydrophobic effect
Pattern recognition algorithm
Polythiophene and poly(3-n-dodecylthiphene)
Swelling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Novel gas sensor devices have been developed using polythiophene (pTh) film and poly(3-n-dodecylthiophene) (pDpTh) film coated over pTh film. These polymer films were electrochemically deposited and doped by cyclic voltammetry on thin-film electrodes where the isolation gap was formed by a micromachining process. We examined the response characteristics of the conducting polymer films against various sample gases over a range of temperatures of the sensitive layer. The resistance changes of both sensitive layers of pTh and pDpTh were highly dependent on the kind of layer. In particular, pTh film responded to ammonia gas and pDpTh films clearly responded to hydrophobic gases, such as chloroform, methane and ethanol. The response of these films to several gases was analyzed with a pattern recognition (PARC) algorithm. It was found that our simple gas sensor device could discriminate between the gases that were used here.
ISSN:0925-4005
1873-3077
DOI:10.1016/S0925-4005(01)01069-3