2015/05/07 by Florian Kögler, Florian Kogler, Orlin D. Velev +6 · 1 citation
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Material Dynamics and Properties #Pickering emulsions and particle stabilization #Soft Condensed Matter (cond-mat.soft) #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.1505.01666
arxiv created 2015/05/07 · openalex publication_date 2015/05/07 · arxiv updated 2015/05/08 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
Based on Brownian Dynamics computer simulations in two dimensions we investigate aggregation scenarios of colloidal particles with directional interactions induced by multiple external fields. To this end we propose a model which allows continuous change in the particle interactions from point-dipole-like to patchy-like (with four patches). We show that, as a result of this change, the non-equilibrium aggregation occurring at low densities and temperatures transforms from conventional diffusion-limited cluster aggregation (DLCA) to slippery DLCA involving rotating bonds; this is accompanied by a pronounced change of the underlying lattice structure of the aggregates from square-like to hexagonal ordering. Increasing the temperature we find a transformation to a fluid phase, consistent with results of a simple mean-field density functional theory.