Colloidal Brazil-nut effect in sediments of binary charged suspensions

被引：19

作者：

Esztermann, A ^{[1
]}

Löwen, H ^{[1
]}

机构：

[1] Univ Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, Germany

来源：

EUROPHYSICS LETTERS | 2004年 / 68卷 / 01期

关键词：

D O I：

10.1209/epl/i2004-10168-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Equilibrium sedimentation density profiles of charged binary colloidal suspensions are calculated by computer simulations and density-functional theory. For deionized samples, we predict a colloidal "Brazil nut" effect: heavy colloidal particles sediment on top of the lighter ones provided that their mass per charge is smaller than that of the lighter ones. This effect is verifiable in settling experiments.

引用

页码：120 / 126

页数：7

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