| Issue |
Europhys. Lett.
Volume 51, Number 5, September I 2000
|
|
|---|---|---|
| Page(s) | 584 - 598 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2000-00378-5 | |
| Published online | 01 September 2002 | |
Dynamical properties of wall-confined colloids
Universität Konstanz, Fachbereich Physik - Postfach 5560,
D-78457 Konstanz, Germany
Corresponding author: Raphael.Pesche@Uni-Konstanz.de
Received:
15
May
2000
Accepted:
29
June
2000
We report on a Stokesian Dynamics simulation study of monolayers of spherical colloidal particles diffusing in the midplane between two parallel walls. The method accounts for many-body hydrodynamic interactions (HI) between particles and particles and walls. Two cases are studied: hard spheres between neutral walls and charged particles interacting by a Yukawa-type potential. Various properties are calculated: mean-squared displacement, self-diffusion coefficient, van Hove functions and hydrodynamic functions. The importance of HI is assessed by treating particle-particle and particle-wall HI separately. Striking features are discussed like the hydrodynamic enhancement of self-diffusion for strongly charged particles and the unbounded increase of the hydrodynamic function at small wave numbers.
PACS: 82.70.Dd – Colloids / 05.10.Gg – Stochastic analysis methods (Fokker-Planck, Langevin, etc.) / 05.40.Jc – Brownian motion
© EDP Sciences, 2000
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