Dynamical heterogeneities close to a colloidal gel
arXiv:cond-mat/0412364 · doi:10.1063/1.1768936
Abstract
Dynamical heterogeneities in a colloidal fluid close to gelation are studied by means of computer simulations. A clear distinction between some fast particles and the rest, slow ones, is observed, yielding a picture of the gel composed by two populations with different mobilities. Analyzing the statics and dynamics of both sets of particles, it is shown that the slow particles form a network of stuck particles, whereas the fast ones are able to move over long distances. Correlation functions show that the environment of the fast particles relaxes much faster than that of the slow ones, but at short times the bonds between fast particles are longer lived due to the flexibility of their structure. No string-like motion is observed for the fast particles, but they occupy preferential sites in the surface of the structure formed by the slow ones.
References in corpus (14)
- Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture II: Intermediate Scattering Function and Dynamic Susceptibility
- Spatial Correlations of Mobility and Immobility in a Glassforming Lennard-Jones Liquid
- Properties of cage rearrangements observed near the colloidal glass transition
- Nonergodicity transitions in colloidal suspensions with attractive interactions
- Reentrant glass transition in a colloid-polymer mixture with depletion attractions
- Ideal glass-glass transitions and logarithmic decay of correlations in a simple system
- Glasses in hard spheres with short-range attraction
- Comparative simulation study of colloidal gels and glasses
- Growing spatial correlations of particle displacements in a simulated liquid on cooling toward the glass transition
- A quantitative test of the mode-coupling theory of the ideal glass transition for a binary Lennard-Jones system
- A cluster mode-coupling approach to weak gelation in attractive colloids
- Simulation study of Non-ergodicity Transitions: Gelation in Colloidal Systems with Short Range Attractions
- Mechanical Properties of a Model of Attractive Colloidal Solutions
- Evidence for Unusual Dynamical Arrest Scenario in Short Ranged Colloidal Systems
Cited by in corpus (43)
- Colloidal Gels: Equilibrium and Non-Equilibrium Routes
- Slow dynamics in glassy soft matter
- Nature of the Breakdown in the Stokes-Einstein Relationship in a Hard Sphere Fluid
- Perspective: Nonequilibrium glassy dynamics in dense systems of active particles
- Relaxation in a glassy binary mixture: Comparison of the mode-coupling theory to a Brownian dynamics simulation
- Structural relaxation of polydisperse hard spheres: comparison of the mode-coupling theory to a Langevin dynamics simulation
- Relaxation in a glassy binary mixture: Mode-coupling-like power laws, dynamic heterogeneity and a new non-Gaussian parameter
- Heterogeneous diffusion in a reversible gel
- Length scale dependent relaxation in colloidal gels
- How short-range attractions impact the structural order, self-diffusivity, and viscosity of a fluid
- Structure and Relaxation Dynamics of a Colloidal Gel
- Dynamic heterogeneities above and below the mode-coupling temperature. Evidence of a dynamic crossover
- A random walk description of the heterogeneous glassy dynamics of attracting colloids
- Validity of Stokes-Einstein Relation in Soft Colloids up to the Glass Transition
- Real Space Analysis of Colloidal Gels: Triumphs, Challenges and Future Directions
- Local structure and dynamics in colloidal fluids and gels
- Structural anomalies of fluids: Origins in second and higher coordination shells
- Shear Viscosity of Clay-like Colloids in Computer Simulations and Experiments
- Time scale for the onset of Fickian diffusion in supercooled liquids
- Viscoelasticity and Stokes-Einstein relation in repulsive and attractive colloidal glasses
- Fickian crossover and lengthscales from two point functions in supercooled liquids
- Dynamical Heterogeneity and Nonlinear Susceptibility in Short-Ranged Attractive Supercooled Liquids
- Non-equilibrium dynamics of spin facilitated glass models
- Non-Gaussian Dynamics in Smectic Liquid Crystals of Parallel Hard Rods
- Dynamical heterogeneity in a model for permanent gels: Different behavior of dynamical susceptibilities
- Complex viscosity behavior and cluster formation in attractive colloidal systems
- The role of quench rate in colloidal gels
- Dynamic heterogeneities in attractive colloids
- A structural comparison of models of colloid-polymer mixtures
- Bulk dynamics of Brownian hard disks: Dynamical density functional theory versus experiments on two-dimensional colloidal hard spheres
- Aging in attraction-driven colloidal glasses
- Heterogeneous Dynamics in Columnar Liquid Crystals of Parallel Hard Rods
- Nonlinear rheology of dense colloidal systems with short-ranged attraction: A mode-coupling theory analysis
- Flexible confinement leads to multiple relaxation regimes in glassy colloidal liquids
- Particle dynamics in colloidal suspensions above and below the glass-liquid re-entrance transition
- C60: the first one-component gel?
- Aggregation kinetics in a model colloidal suspension
- Dynamical heterogeneity in a glass forming ideal gas
- Dynamical heterogeneities in an attraction driven colloidal glass
- Minimal Model for Dynamic Bonding in Colloidal Transient Networks
- Temperature Dependent Heterogeneous Rotational Correlation in Lipids
- Aging of colloidal gels in microgravity
- Microstructure of polydisperse colloidal gels