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Colloidal aggregation induced by long range attractions. | LitMetric

Colloidal aggregation induced by long range attractions.

Langmuir

Group of Complex Fluids Physics, Department of Applied Physics, University of Almería, 04120 Almería, Spain.

Published: October 2004

The structure of colloidal clusters formed by long-range attractive interactions under diluted conditions is studied by means of Monte Carlo simulations. For a not-too-long attraction range, clusters show self-similar internal structure with lower density than that typical for diffusive aggregation. For long-range interactions, low kappa, nonfractal clusters are formed (dense at short scales but open at long ones). The dependence on the volume fraction shows that more-compact clusters are grown the higher the colloidal density for diffusive aggregation and attraction-driven aggregation in the fractal regime. The whole trend is explained in terms of the interpenetration among aggregates. In attraction-driven aggregations, the interpenetration of clusters competes with aggregation in the tips of the clusters, causing low-density clusters.

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Source
http://dx.doi.org/10.1021/la0486640DOI Listing

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