On Stokes-Einstein and Debye behaviour in colloidal fluids

Authors
Koenderink, GH Philipse, AP
Citation
Gh. Koenderink et Ap. Philipse, On Stokes-Einstein and Debye behaviour in colloidal fluids, J PHYS IV, 10(P7), 2000, pp. 295-298
Citations number
12
Categorie Soggetti
Physics
Journal title
JOURNAL DE PHYSIQUE IV
ISSN journal
11554339 → ACNP
Volume
10
Issue
P7
Year of publication
2000
Pages
295 - 298
Database
ISI
SICI code
1155-4339(200005)10:P7<295:OSADBI>2.0.ZU;2-I
Abstract
We discuss recent experiments on tracer sphere diffusion in colloidal host suspensions. Stokes-Einstein behaviour (tracer diffusion inversely proporti onal to host viscosity) is observed at low host viscosities, i.e. the host suspension behaves as an effective fluid. At high host viscosities, however , tracer diffusion decouples from the viscosity and the host suspension beh aves more like a static confining geometry.