Single-particle and collective slow dynamics of colloids in porous confinement
arXiv:0906.0929 · doi:10.1103/PhysRevLett.103.138303
Abstract
Using molecular dynamics simulations we study the slow dynamics of a hard sphere fluid confined in a disordered porous matrix. The presence of both discontinuous and continuous glass transitions as well as the complex interplay between single-particle and collective dynamics are well captured by a recent extension of mode-coupling theory for fluids in porous media. The degree of universality of the mode-coupling theory predictions for related models of colloids is studied by introducing size-disparity between fluid and matrix particles, as well as softness in the interactions.
4 pages, 5 figures, minor revisions
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- Impact of random obstacles on the dynamics of a dense colloidal fluid
- Statistical mechanics of homogeneous partly pinned fluid systems
- Relaxation dynamics in a transient network fluid with competing gel and glass phases
- Tagged-particle motion in a dense confined liquid
- Dynamic arrest in model porous media -- intermediate scattering functions
- Space-resolved dynamics of a tracer in a disordered solid
- Dynamic heterogeneities and non-Gaussian behavior in two-dimensional randomly confined colloidal fluids
- Localization phenomena in models of ion-conducting glass formers
- Two-dimensional systems with competing interactions: microphase formation under the effect of a disordered porous matrix