Numéro
J. Phys. France
Volume 44, Numéro 3, mars 1983
Page(s) 285 - 291
DOI https://doi.org/10.1051/jphys:01983004403028500
J. Phys. France 44, 285-291 (1983)
DOI: 10.1051/jphys:01983004403028500

Measurement of the short-time self-mobility of particles in concentrated suspension. Evidence for many-particle hydrodynamic interactions

P.N. Pusey1 et W. van Megen2

1  Royal Signals and Radar Establishment, Malvern, Worcestershire, WR14 3PS, England
2  Department of Applied Physics, Royal Melbourne Institute of Technology, Melbourne, Victoria, Australia


Abstract
The short-time self-mobilities of spherical colloidal particles in concentrated liquid suspensions were measured by photon correlation spectroscopy. For volume fractions Φ ≳ 0.3, theory incorporating two-particle hydrodynamic interactions was not adequate to describe the data, indicating the importance of many-particle contributions.


Résumé
Nous avons mesuré par spectroscopie de corrélation de photons la self-mobilité aux temps courts de particules colloïdales sphériques dans des suspensions liquides concentrées. Pour des fractions en volume Φ ≳ 0,3, la théorie incluant les interactions hydrodynamiques à deux corps ne permet pas de décrire nos résultats, ce qui indique l'importance des interactions multiples.

PACS
8270K - Emulsions and suspensions.

Key words
colloids -- diffusion in liquids -- light scattering -- photon correlation spectroscopy -- polymers