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EQCM and Quartz Crystal Impedance Measurements for the Characterization of Thiophene-Based Conducting Polymers

Published online by Cambridge University Press:  10 February 2011

C. Arbizzani ,
F. Soavi  and
M. Mastragostino
C. Arbizzani
Affiliation:
University of Bologna, Dept. of Chemistry “G. Ciamician”, Bologna, Italy
F. Soavi
Affiliation:
University of Bologna, Dept. of Chemistry “G. Ciamician”, Bologna, Italy
M. Mastragostino
Affiliation:
University of Palermo, Dept. of Physical Chemistry, Palermo, Italy
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Abstract

EQCM was extensively used to investigate ion-transport phenomena during dopingundoping processes of electronically conducting polymers. Several early studies assumed that the polymer films were rigidly coupled to the quartz crystal so as to relate the mass change to the quartz crystal resonant frequency change via the Sauerbrey equation. However, the rigidity of electronically conducting polymer films is doubtful and it has to be demonstrated. Quartz crystal impedance analysis near the resonance is of paramount importance to get insight into the viscoelastic properties of the film [1] and to avoid misleading in the interpretation of EQCM data.

This contribution presents and discusses quartz crystal impedance measurements, performed with a Frequency Response Analyzer in the 9MHz region, and EQCM data collected for a dithienothiophene based polymer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 600: Symposium FF – Electroactive Polymers , 1999 , 197
Copyright
Copyright © Materials Research Society 2000

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References

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