Colloidal brazil nut effect in sediments of binary charged suspensions

Details Colloidal brazil nut effect in sediments of binary charged suspensions Colloidal brazil nut effect in sediments of binary charged suspensions

2004-01-02

arxiv.org/abs/cond-mat/0401010v1

Europhys. Lett., 68 (1), pp. 120-126 (2004)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1209/epl/i2004-10168-7

Equilibrium sedimentation density profiles of charged binary colloidal suspensions are calculated by computer simulations and density functional theory. For deionized samples, we predict a colloidal ``brazil nut'' effect: heavy colloidal particles sediment on top of the lighter ones provided that their mass per charge is smaller than that of the lighter ones. This effect is verifiable in settling experiments.

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