A Robust Flexible Electrochemical Gas Sensor Using Room Temperature Ionic Liquid

This paper introduces a robust electrochemical gas sensor featuring room temperature ionic liquid (RTIL) as electrolyte and porous polytetrafluoroethylene as a flexible substrate. Using a planar-electrodes-on-permeable-membrane structure, a flexible RTIL sensor with 9.6 mm 2 sensing area is microfab...

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Bibliographic Details
Published inIEEE sensors journal Vol. 13; no. 10; pp. 3976 - 3981
Main Authors Xiaoyi Mu, Zhe Wang, Xiangqun Zeng, Mason, Andrew J.
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2013
Subjects
electrochemical sensor
flexible sensor
Gas sensor
room temperature ionic liquid
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Summary:This paper introduces a robust electrochemical gas sensor featuring room temperature ionic liquid (RTIL) as electrolyte and porous polytetrafluoroethylene as a flexible substrate. Using a planar-electrodes-on-permeable-membrane structure, a flexible RTIL sensor with 9.6 mm 2 sensing area is microfabricated. The sensor's response to oxygen is measured, achieving sensitivity of 0.48 μA/%O 2 , a linearity of 0.997 R 2 in range of 0%-21% O 2 , and limit of detection of 0.08% O 2 . The reported sensor structure and fabrication process enable realization of sensor arrays for multi-gas monitoring in a low power, miniaturized, and wearable system platform.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2013.2262932