Observation of Brownian motion on the time scale of hydrodynamic interactions

M. H. Kao; A. G. Yodh; D. J. Pine

doi:10.1103/PhysRevLett.70.242

Observation of Brownian motion on the time scale of hydrodynamic interactions

M. H. Kao, A. G. Yodh, D. J. Pine

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We resolve the mean square displacement of particles in concentrated suspensions during the first 20 ns of their motion, before hydrodynamic interactions between particles have had time to fully develop. Nevertheless, we find that the concentrated systems exhibit clear deviations from the isolated-particle theory. These deviations are well described by several scaled versions of the isolated particle theory. The measurements also demonstrate a new multiple-scattering photon correlation technique with ultrashort time resolution.

Original language	English (US)
Pages (from-to)	242-245
Number of pages	4
Journal	Physical Review Letters
Volume	70
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.70.242
State	Published - 1993

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "We resolve the mean square displacement of particles in concentrated suspensions during the first 20 ns of their motion, before hydrodynamic interactions between particles have had time to fully develop. Nevertheless, we find that the concentrated systems exhibit clear deviations from the isolated-particle theory. These deviations are well described by several scaled versions of the isolated particle theory. The measurements also demonstrate a new multiple-scattering photon correlation technique with ultrashort time resolution.",

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