Colloidal gelation, percolation and structural arrest
arXiv:cond-mat/0312591 · doi:10.1016/j.physa.2005.07.003
Abstract
By means of molecular dynamics, we study a model system for colloidal suspensions where the interaction is based on a competition between attraction and repulsion. At low temperatures the relaxation time first increases as a power law as a function of the volume fraction and then, due to the finite lifetime of the bonded structures, it deviates from this critical behavior. We show that colloidal gelation at low temperatures and low volume fractions is crucially related to the formation of spanning long living cluster. Besides agreeing with experimental findings in different colloidal systems, our results shed new light on the different role played by the formation of long living bonds and the crowding of the particles in colloidal structural arrest.
new version, 5 pages, 9 figures
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- Shear Viscosity of Clay-like Colloids in Computer Simulations and Experiments
- Lamellar order, microphase structures and glassy phase in a field theoretic model for charged colloids
- Dynamic heterogeneities in attractive colloids
- A Stability Diagram for Dense Suspensions of Model Colloidal Al2O3-Particles in Shear Flow
- Static and dynamic heterogeneities in irreversible gels and colloidal gelation
- Computational Steering of Cluster Formation in Brownian Suspensions
- Cluster structure and dynamics in gels and glasses