Evidence for charge regulation in the sedimentation of charged colloids

被引：25

作者：

Biesheuvel, PM ^{[1
]}

机构：

[1] Univ Wageningen & Res Ctr, Lab Phys Chem & Colloid Sci, NL-6703 HB Wageningen, Netherlands

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 49期

关键词：

D O I：

10.1088/0953-8984/16/49/L01

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Recent experimental data for the centrifugal sedimentation-diffusion profile of charged colloidal silica (phi similar to 44 nm) in ethanol is analysed based on local charge neutrality and by either assuming a fixed particle charge or incorporating charge regulation. Especially at a high Debye length ( > 30 nm) the two models deviate at higher particle volume fractions phi ( > 0.1 vol%) with the data much better reproduced when charge regulation is included.

引用

页码：L499 / L504

页数：6

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