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

摘要

EQCM was extensively used to investigate ion-transport phenomena during doping-undoping 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.