Nondiffusive Brownian motion studied by diffusing-wave spectroscopy

D. A. Weitz, D. J. Pine, P. N. Pusey, R. J A Tough

Research output: Contribution to journalArticlepeer-review


On a short time scale, Brownian particles undergo a transtion from the initial ballistic trajectories to diffusive motion. Hydrodynamic interactions with the surrounding fluid lead to a complex time dependence of this transition. We directly probe this transition for colloidal particles by measuring the autocorrelation function of multiply scattered, transmitted light. We show that a quantitative interpretation is possible because the transport of the light is diffusive, resolving a conflict in previous measurements.

Original languageEnglish (US)
Pages (from-to)1747-1750
Number of pages4
JournalPhysical Review Letters
Issue number16
StatePublished - 1989

ASJC Scopus subject areas

  • General Physics and Astronomy


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