Shear moduli of anion and cation exchanging polypyrrole films

被引：21

作者：

Koehler, S ^{[1
]}

Bund, A ^{[1
]}

Efimov, I ^{[1
]}

机构：

[1] Dresden Univ Technol, Inst Phys Chem & Electrochem, D-01062 Dresden, Germany

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2006年 / 589卷 / 01期

关键词：

conducting polymers; EQCM; acoustic impedance; shear modulus;

D O I：

10.1016/j.jelechem.2006.01.013

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

By using the acoustic impedance method, storage (G') and loss moduli (G') have been determined for poly(pyrrole) films grown on the gold electrode of an electrochemical quartz crystal microbalance from aqueous LiClO4 and sodium tosylate solutions. At 10 MHz, for 0.3-0.4 mu m films G' = 6 x 10(6), G '' = 2 x 10(6) dyn/cm(2) for perchlorate and 2.5 x 10(8) and 1.1 x 10(8) dyn/cm(2) for tosylate ions were determined. Cycling in the corresponding monomer free solutions did not significantly change the properties of the perchlorate anion film, but decreased the moduli of the tosylate films to 6-8 x 10(7) dyn/cm(2). A slight increase of G during oxidation has been observed, i.e., the films are more stiff in the oxidized state. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：82 / 86

页数：5

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