Weak long-ranged Casimir attraction in colloidal crystals
- 1 February 2002
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 57 (3) , 451-457
- https://doi.org/10.1209/epl/i2002-00481-1
Abstract
We investigate the influence of geometric confinement on the free energy of an idealized model for charge-stabilized colloidal suspensions. The mean-field Poisson-Boltzmann formulation for this system predicts pure repulsion among macroionic colloidal spheres. Fluctuations in the simple ions' distribution provide a mechanism for the macroions to attract each other at large separations. Although this Casimir interaction is long-ranged, it is too weak to influence colloidal crystals' properties.Keywords
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