Influence of the ionic strength on the structure of polyelectrolyte films at the solid/liquid interface

被引：218

作者：

Steitz, R

Leiner, V

Siebrecht, R

von Klitzing, R

机构：

[1] Tech Univ Berlin, Iwan N Stranski Inst Phys & Theoret Chem, D-10623 Berlin, Germany

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] Ruhr Univ Bochum, Inst Festkorperphys, D-44780 Bochum, Germany

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 163卷 / 01期

关键词：

ultrathin films; internal structure; polyelectrolyte multilayer; neutron scattering; X-ray scattering;

D O I：

10.1016/S0927-7757(99)00431-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of polyelectrolyte multilayers built up by alternate adsorption of polyanions and polycations is investigated by X-ray reflectivity at the solid/air and neutron reflectivity at the solid/liquid interface. The experiments provide detailed information about the density gradient of polyelectrolyte chains across the film and show the influence of the water content of the film on the internal structure. The polyelectrolyte density is determined by the adsorption conditions (e.g. amount of NaCl) and cannot be changed by addition of salt after adsorption. After drying the film thickness is reduced by 30%. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：63 / 70

页数：8

共 21 条

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