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Updated: Jul 16, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Noncentral forces in crystals of charged colloids
D Reinke1, H Stark, H-H von Grünberg
1Physics Department, University of Konstanz, 78457 Konstanz, Germany.
Abstract:
The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties.
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