Light scattering studies of Brownian motion in confined geometries |
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Authors: | N Ostrowsky L Lobry |
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Institution: | (1) Laboratoire de Physique de la Matière Condensée, CNRS URA 190, Université de Nice Sophia Antipolis, F-06108 Nice Cedex, France |
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Abstract: | Summary Dynamic light scattering can be a useful tool to determine the confinement of Brownian particles whose motion is restricted
to dimensions comparable to the wavelength of the light. The theoretical form of the correlation function of the electric
field scattered from such trapped particles has been derived and compared with the signal obtained both in a simulated experiment
and in a real experiment where the particles are trapped in a glass wedge. This new result can be of relevance for particles
trapped in various media such as a porous (transparent) media, a gel, a suspension of lamellar phases or even a concentrated
colloidal suspension where a particle is ?trapped? by its neighbours.
Paper presented at the I International Conference on Scaling Concepts and Complex Fluids, Copanello, Italy, July 4–8, 1994. |
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Keywords: | Propagation and transmission in homogeneous media |
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