Tracer diffusion in colloidal gels

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dc.creatorBabu, Sujin
dc.creatorGimel, Jean Christophe
dc.creatorNicolai, Taco
dc.date2007-05-09
dc.date.accessioned2026-07-07T12:55:50Z
dc.date.available2026-07-07T12:55:50Z
dc.descriptionComputer simulations were done of the mean square displacement (MSD) of tracer particles in colloidal gels formed by diffusion or reaction limited aggregation of hard spheres. The diffusion coefficient was found to be determined by the volume fraction accessible to the spherical tracers ($ϕ_a$) independent of the gel structure or the tracer size. In all cases, critical slowing down was observed at $ϕ_a\approx 0.03$ and was characterized by the same scaling laws reported earlier for tracer diffusion in a Lorentz gas. Strong heterogeneity of the MSD was observed at small $ϕ_a$ and was related to the size distribution of pores.
dc.description6 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0705.1266
dc.identifierhttp://arxiv.org/abs/0705.1266
dc.identifierJ. Phys. Chem. B, 2008, 112 (3), pp 743 - 748
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224384
dc.subjectSoft Condensed Matter
dc.titleTracer diffusion in colloidal gels
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