2017/09/27 by Isha Malhotra, Malhotra, Isha, Sujin B. Babu +1
Chemistry · Materials Science · #FOS: Physical sciences #Pickering emulsions and particle stabilization #Soft Condensed Matter (cond-mat.soft) #Surfactants and Colloidal Systems
paper · pdf · doi:10.48550/arxiv.1710.09255
openalex publication_date 2017/09/27 · openalex created_date 2022/09/27 · openalex updated_date 2026/07/28
In the present study we are performing simulation of simple model of two\npatch colloidal particles undergoing irreversible diffusion limited cluster\naggregation using patchy Brownian cluster dynamics. In addition to the\nirreversible aggregation of patches, the spheres are coupled with isotropic\nreversible aggregation through the Kern-Frenkel potential. Due to the presence\nof anisotropic and isotropic potential we have also defined 3 different kinds\nof clusters formed due to anisotropic potential and isotropic potential only as\nwell as both the potentials together. We have investigated the effect of patch\nsize on self-assembly under different solvent qualities for various volume\nfractions. We will show that at low volume fractions during aggregation\nprocess, we end up in a chain conformation for smaller patch size while in a\nglobular conformation for bigger patch size. We also observed a chain to bundle\ntransformation depending on the attractive interaction strength between the\nchains or in other words depending on the quality of the solvent. We will also\nshow that bundling process is very similar to nucleation and growth phenomena\nobserved in colloidal system with short range attraction. We have also studied\nthe bond angle distribution for this system, where for small patches only 2\nangles are more probable indicating chain formation, while for bundling at very\nlow volume fraction a tail is developed in the distribution. While for the case\nof higher patch angle this distribution is broad compared to the case of low\npatch angles showing we have a more globular conformation. We are also\nproposing a model for the formation of bundles which are similar to amyloid\nfibers using two patch colloidal particles.\n