| Issue |
Europhys. Lett.
Volume 52, Number 4, November II 2000
|
|
|---|---|---|
| Page(s) | 474 - 480 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2000-00462-x | |
| Published online | 01 September 2002 | |
The role of hydrodynamic interactions in colloidal electrolyte friction and sedimentation
Universität Konstanz, Fachbereich Physik - Postfach 5560,
D-78457 Konstanz, Germany
Corresponding author: gerhard.naegele@uni-konstanz.de
Received:
24
July
2000
Accepted:
15
September
2000
Based on a recently formulated mode coupling scheme for Brownian systems, new analytical expressions are derived for the time-resolved tracer-diffusion, electrolyte friction coefficient and sedimentation velocity of a colloidal macroion suspended in a many-component electrolyte solution. Use of these expressions yields good agreement with experimental data and Booth's theory of macroion sedimentation. Our theoretical expressions allow for a separate assessment of the influence of hydrodynamic and potential forces on the relaxation of the electrolyte atmosphere. Inclusion of hydrodynamic interactions (HI) effects is shown to be essential for a proper description of colloidal electrolyte friction and sedimentation.
PACS: 82.70.Dd – Colloids / 05.40.Jc – Brownian motion
© EDP Sciences, 2000
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