Title: Reversible aggregation of patchy colloidal particles: chains, bundles and crystals.

Biography:

Worked in a wide variety of research areas including:
energy: crude oil fouling, petroleum additives, Li-ion batteries, solar cells, biofuels
surfactants: cleaning studies, fundamental adsorption
proteins: assay development, therapeutic enclosure studies, biocompatibility evaluation
polymers: photoresist degradation, polyelectrolytes, biocompatibility, coatings
lipids: model cell membranes, nanoparticle – membrane interactions, protein – membrane interactions
cells: spreading, conformational changes
combination techniques: QCM-D/electrochemistry, QCM-D/ellipsometry, QCM-D/microscopy, L/BAM, L/ISR, L/PMI, contact angle/topography, contact angle/high pressure

Abstract

In the present study we are performing simulation of simple model of two patch colloidal particles undergoing reversible diffusion limited cluster aggregation using patchy Brownian cluster dynamics. In addition to the reversible aggregation of patches, the spheres are coupled with isotropic reversible aggregation through the Kern-Frenkel potential. We have investigated the effect of strength of bond (anisotropic and isotropic) interaction on self-assembly under different solvent qualities for various volume fractions. We define the strength of isotropic (anisotropic) temperature T_i (T_a). 

Title: Reversible aggregation of Patchy Colloidal particles: Chains, bundles and crystals.

Biography:

Abstract

In the present study we are performing simulation of simple model of two patch colloidal particles undergoing reversible diffusion limited cluster aggregation using patchy Brownian cluster dynamics. In addition to the reversible aggregation of patches, the spheres are coupled with isotropic reversible aggregation through the Kern-Frenkel potential. We have investigated the effect of strength of bond (anisotropic and isotropic) interaction on self-assembly under different solvent qualities for various volume fractions. We define the strength of isotropic (anisotropic) temperature T_i (T_a). We will show that at low T_i, we end up with chain conformation or monomeric conformation depending upon T_a.  Bundling and crystallization process is similar to nucleation and growth phenomenon observed in colloidal system with short-range interaction. Transition from chains to bundles and bundles to crystals will be discussed. We are also proposing a model for amyloid fibers and sickle cell crystallization.