Electrochemistry at ultrathin polyelectrolyte films self-assembled at planar gold electrodes

被引：58

作者：

Han, S ^{[1
]}

Lindholm-Sethson, B ^{[1
]}

机构：

[1] Umea Univ, Dept Chem, S-90187 Umea, Sweden

来源：

ELECTROCHIMICA ACTA | 1999年 / 45卷 / 06期

关键词：

polyelectrolyte film; PSS; PAH; self-assembly; permeability; cyclic voltammetry; impedance spectroscopy;

D O I：

10.1016/S0013-4686(99)00295-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Planar positively-charged gold electrode surfaces were modified by consecutive adsorption of poly(styrene sulfonate), PSS, and protonated poly(allyl amine), PAH. By varying the sulphuric acid concentration in the PAH adsorption solution it was possible to obtain films with two different thicknesses. The permeability of the two types of self-assembled films was probed by studying the cyclic voltammetric response with two electroactive species in the supporting electrolyte; i.e. an anion, Fe(CN)(6)(4-) and a cation, Os(bipy)(3)(3+). Electrochemical impedance spectroscopy was also employed in the characterisation of the films. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：845 / 853

页数：9

共 26 条

[1] CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES [J].