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Emeraldine Base Thin Film Carbon Dioxide Sensor

Published online by Cambridge University Press:  01 February 2011

Mihai Irimia-Vladu  and
Jeffrey W. Fergus
Mihai Irimia-Vladu
Affiliation:
irimimi@auburn.edu, Auburn University, Materials Research and Education Center, 275 Wilmore Laboratories, Auburn, Alabama, 36849, United States, (334)-444-3620, (334)-444-3400
Jeffrey W. Fergus
Affiliation:
jwfergus@eng.auburn.edu, Auburn University, Materials Research and Education Center, United States
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Abstract

A thin film of emeraldine base polyaniline in NMP was cast on an interdigitated electrode and its conductivity investigated by impedance spectroscopy. The thin film responded to carbonic acid solutions of various pHs lower than 5. In general, an emeraldine base (EB) to emeraldine salt (ES) transformation occurs by protonation when the pH is less than 4. In the present case, the stages that occur prior to the onset of changes in total conductivity are detected by impedance spectroscopy. The sensor output was stable and reversible over a period of 3 months of testing.

Keywords

polymerelectronic materialsensor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 889: Symposium W – Electroresponsive Polymers and Their Applications , 2005 , 0889-W01-10
Copyright
Copyright © Materials Research Society 2006

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References

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