Long range hydration effects in electrolytic free suspended black films

被引：31

作者：

Sentenac, D ^{[1
]}

Benattar, JJ ^{[1
]}

机构：

[1] Ctr Etud Saclay, Serv Phys Etat Condense, F-91911 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.81.160

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The force law within free suspended black films made of negatively charged aerosol-OT with added LiCl or CsCl is studied accurately using x-ray reflectivity (ca. 1 Angstrom). We find an electrolyte concentration threshold above which a substantial additional repulsion is detected in the LiCl films, up to distances of 100 Angstrom. We interpret this phenomenon as an augmentation of the Debye screening length, due to the local screening of the condensed hydrophilic counterions by the primary hydration shell.

引用

页码：160 / 163

页数：4

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