Steric interactions in cellular structures formed in a water/oil/surfactant/cosurfactant mixture

被引：11

作者：

Molle, B

de Geyer, A

Guillermo, A

Farago, B

机构：

[1] Univ Grenoble 1, CNRS,UMR 5819, CEA, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

[2] Spectrometrie Phys Lab, UMR C5588, F-38402 St Martin Dheres, France

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.90.068305

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dynamics of dense microemulsion droplets forming ordered cellular phases as temperature increases are investigated by neutron spin echo spectroscopy (NSE). The shape fluctuations of droplets are shown using a specific contrast. Their relaxation time tau(f) is obtained by analysis of the NSE curves, which also reveals the short-range Brownian motion (diffusion constant D-0) of the "caged" droplets. The thermal dependence of D-0 and tau(f) supports the notion of entropically driven interdroplet steric repulsion stabilizing the cellular phases.

引用

页数：4

共 15 条

[1] Evidence for spontaneous formation of three-dimensionally periodic cellular structures in a water/oil/surfactant/alcohol system [J].