Structure formation in binary colloids

Details Structure formation in binary colloids Structure formation in binary colloids

2003-10-22

arxiv.org/abs/cond-mat/0310535v1

Physics

Condensed Matter

Soft Condensed Matter

revtex, 4 pages, figures available from authors due to size problems

Scientific paper

10.1103/PhysRevE.69.030501

A theoretical study of the structure formation observed very recently [Phys. Rev. Lett. 90, 128303 (2003)] in binary colloids is presented. In our model solely the dipole-dipole interaction of the particles is considered, electrohidrodynamic effects are excluded. Based on molecular dynamics simulations and analytic calculations we show that the total concentration of the particles, the relative concentration and the relative dipole moment of the components determine the structure of the colloid. At low concentrations the kinetic aggregation of particles results in fractal structures which show a crossover behavior when increasing the concentration. At high concentration various lattice structures are obtained in a good agreement with experiments.

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