Brownian motion in depletion-force networks is studied with video microscopy in confined nearly hard-sphere mixtures. The particle trajectories show anomalous diffusion, while the self part of the van Hove correlation function exhibits a novel scaling in terms of its first moment. A simple model is used to extract the weak elastic modulus of the gel.
Physical Review Letters
brownian motion, colloidal gel, depletion
and Stewart, A.
Anomalous Relaxation in Entropic Colloidal Gels, Physical Review Letters
(Accessed December 6, 2023)