Length scale dependent relaxation in colloidal gels
arXiv:cond-mat/0510690 · doi:10.1103/PhysRevLett.98.028303
Abstract
We use molecular dynamics computer simulations to investigate the relaxation dynamics of a simple model for a colloidal gel at a low volume fraction. We find that due to the presence of the open spanning network this dynamics shows at low temperature a non-trivial dependence on the wave-vector which is very different from the one observed in dense glass-forming liquids. At high wave vectors the relaxation is due to the fast cooperative motion of the branches of the gel network, whereas at low wave vectors the overall rearrangements of the heterogeneous structure produce the relaxation process.
4 pager, 4 figures, revised version
References in corpus (9)
- Slow dynamics in glassy soft matter
- Evolution of particle-scale dynamics in an aging clay suspension
- Model for reversible colloidal gelation
- A cluster mode-coupling approach to weak gelation in attractive colloids
- Dynamical heterogeneities close to a colloidal gel
- Supercooled Liquids Under Shear: Theory and Simulation
- Structure and Relaxation Dynamics of a Colloidal Gel
- Colloidal gelation, percolation and structural arrest
- A unifying model for chemical and colloidal gels
Cited by in corpus (25)
- Colloidal Gels: Equilibrium and Non-Equilibrium Routes
- Colloidal systems with competing interactions: from an arrested repulsive cluster phase to a gel
- Elasticity of arrested short-ranged attractive colloids: homogeneous and heterogeneous glasses
- Elastically driven, intermittent microscopic dynamics in soft solids
- Long-lived neighbors determine the rheological response of glasses
- Microscopic Picture of Cooperative Processes in Restructuring Gel Networks
- Colloidal gelation with variable attraction energy
- Self-assembly and cooperative dynamics of a model colloidal gel network
- Multiple-Time Scaling and Universal Behavior of the Earthquake Interevent Time Distribution
- Structural Relaxation of a Gel Modeled by Three Body Interactions
- A Lattice Model for Colloidal Gels and Glasses
- Ultra-long-range dynamic correlations in a microscopic model for aging gels
- Gelling by Heating
- Dynamic heterogeneities in attractive colloids
- Computer Simulation Study of the Phase Behavior and Structural Relaxation in a Gel-Former Modeled by Three Body Interactions
- Relaxation dynamics in a transient network fluid with competing gel and glass phases
- Active interaction switching controls the dynamic heterogeneity of soft colloidal dispersions
- A minimal model for short-time diffusion in periodic potentials
- Reconfiguration, Interrupted Aging and Enhanced Dynamics of a Colloidal Gel using Photo-Switchable Active Doping
- The shear modulus of metastable amorphous solids with strong central and bond-bending interactions
- A Minimal description of morphological hierarchy in two-dimensional aggregates
- Entropy-driven phase behavior of associative polymer networks
- Low temperature behaviour and glass line of the symmetrical colloidal electrolyte
- Solution of Disordered Microphases in the Bethe approximation
- Network topology in soft gels: hardening and softening materials