Hydrodynamic coupling of two Brownian spheres to a planar surface

Authors
Dufresne, ER Squires, TM Brenner, MP Grier, DG
Citation
Er. Dufresne et al., Hydrodynamic coupling of two Brownian spheres to a planar surface, PHYS REV L, 85(15), 2000, pp. 3317-3320
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
15
Year of publication
2000
Pages
3317 - 3320
Database
ISI
SICI code
0031-9007(20001009)85:15<3317:HCOTBS>2.0.ZU;2-0
Abstract
We describe direct imaging measurements of the collective and relative diff usion of two colloidal spheres near a flat plate. The bounding surface modi fies the spheres' dynamics,even at separations of tens of radii. This behav ior is captured by a stokeslet analysis of fluid flow driven by the spheres ' and wall's no-slip boundary conditions. In particular, this analysis reve als surprising asymmetry in the normal modes for pair diffusion near a flat surface.