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
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.
引用
收藏
页码:582 / 585
页数:4
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