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Colloids in potential energy landscapes

Colloids in potential energy landscapes
The Brownian motion of colloidal particles is one of the classical phenomena in statistical physics. In real situations, however, the particles often do not move freely. Examples include particles diffusing in concentrated dispersions, in inhomogeneous media, such as porous gels or cells, on rough surfaces or in external potentials. We impose an external potential by exposing a colloidal particle to a light field. This offers a large choice of potential energy landscapes. The dynamics of colloidal particles in such potential energy landscapes is observed by microscopy and quantitatively analyzed. This allows us to compare our experimental results to simulations and theoretical predictions.

Physics of Soft Matter:
Ronja F. Capellmann, Stefan U. Egelhaaf

Copyright: Heinrich-Heine-Universität Düsseldorf