Hydrodynamic coupling of two brownian spheres to a planar surface

We describe direct imaging measurements of the collective and relative diffusion of two colloidal spheres near a flat plate. The bounding surface modifies the spheres' dynamics, even at separations of tens of radii. This behavior is captured by a stokeslet analysis of fluid flow driven by the s...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2000-10, Vol.85 (15), p.3317-3320
Main Authors: Dufresne, E R, Squires, T M, Brenner, M P, Grier, D G
Format: Article
Language:English
Subjects:
Colloids - chemistry
Diffusion
Models, Chemical
Silicon Dioxide - chemistry
Surface Properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We describe direct imaging measurements of the collective and relative diffusion of two colloidal spheres near a flat plate. The bounding surface modifies the spheres' dynamics, even at separations of tens of radii. This behavior is captured by a stokeslet analysis of fluid flow driven by the spheres' and wall's no-slip boundary conditions. In particular, this analysis reveals surprising asymmetry in the normal modes for pair diffusion near a flat surface.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.85.3317