ENTROPICALLY DRIVEN SURFACE PHASE-SEPARATION IN BINARY COLLOIDAL MIXTURES

被引：228

作者：

KAPLAN, PD

ROUKE, JL

YODH, AG

PINE, DJ

机构：

[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104

[2] EXXON RES & ENGN CO,ANNANDALE,NJ 08801

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.72.582

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the phase diagram of mixtures of charge stabilized polystyrene spheres of two different sizes in the hard-sphere limit. We observe bulk phase separation into two disordered phases and find a new ordered phase located on the cell walls. The ordered phase occurs at volume fractions as low as 0.2, much less than the value of 0.49 for hard-sphere freezing in monodisperse suspensions, and is qualitatively explained with simple geometric arguments.

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页码：582 / 585

页数：4

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