Nondiffusive brownian-motion studied by diffusing-wave spectroscopy

Citation:

Weitz, D. A. ; Pine, D. J. ; Pusey, P. N. ; Tough, R. J. A. Nondiffusive brownian-motion studied by diffusing-wave spectroscopy. Physical Review Letters 1989, 63, 1747-1750. Copy at http://www.tinyurl.com/y5j7pbsq
weitz1989.pdf361 KB

Abstract:

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.

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Last updated on 07/07/2021