Structure and Relaxation Dynamics of a Colloidal Gel

TL;DR

This study uses molecular dynamics simulations to explore the structure and relaxation dynamics of a colloidal gel at low volume fraction, revealing an open percolating cluster and scale-dependent relaxation behavior.

Contribution

It provides new insights into the structural formation and dynamical relaxation processes of colloidal gels through detailed simulation analysis.

Findings

Formation of an open percolating cluster at low temperature

Relaxation dynamics depend on the length scale or wave-vector

No signs of phase separation observed

Abstract

Using molecular dynamics computer simulations we investigate the structural and dynamical properties of a simple model for a colloidal gel at low volume fraction. We find that at low T the system is forming an open percolating cluster, without any sign of a phase separation. The nature of the relaxation dynamics depends strongly on the length scale/wave-vector considered and can be directly related to the geometrical properties of the spanning cluster.