Minimal Model for Dynamic Bonding in Colloidal Transient Networks

TL;DR

This paper introduces a minimal Brownian Dynamics model for colloidal transient networks with hysteretic bonds, analyzing bond lifetime distributions and dynamic behavior transitions from fluid to arrested states.

Contribution

The study presents a simplified model capturing the essential features of dynamic bonding in colloidal networks, including bond hysteresis and crossover dynamics.

Findings

Bond lifetime distribution characterized

Transition from fluid to arrested network observed

Dynamic correlation functions analyzed

Abstract

We investigate a model for colloidal network formation using Brownian Dynamics computer simulations. Hysteretic springs establish transient bonds between particles with repulsive core. If a bonded pair is separated by a cutoff distance, the spring vanishes and reappears only if the two particles contact each other. We present results for the the bond lifetime distribution and investigate the properties of the van Hove dynamical two-body correlation function. The model displays crossover from fluid-like dynamics, via transient network formation, to arrested quasi-static network behavior.