Boundary mobility controls glassiness of confined colloidal liquids
arXiv:1405.0753 · doi:10.1103/PhysRevLett.112.218302
Abstract
We use colloidal suspensions encapsulated in emulsion droplets to model confined glass-forming liquids with tunable boundary mobility. We show dynamics in these idealized systems are governed by physical interactions with the boundary. Gradients in dynamics are present for more mobile boundaries, whereas for less mobile boundaries gradients are almost entirely suppressed. Motions in a system are not isotropic, but have a strong directional dependence with respect to the boundary. These findings bring into question the ability of conventional quantities to adequately describe confined glasses.
arXiv comment8 pages, 7 figures. Submitted to Phys. Rev. Lett
References in corpus (10)
- The Physics of the Colloidal Glass Transition
- On measuring colloidal volume fractions
- Layering and position-dependent diffusive dynamics of confined fluids
- Colloidal glass transition observed in confinement
- The relaxation dynamics of a simple glass former confined in a pore
- Tracking Rotational Diffusion of Colloidal Clusters
- Growing length scales in a supercooled liquid close to an interface
- Confinement as a tool to probe amorphous order
- Local influence of boundary conditions on a confined supercooled colloidal liquid
- Slow dynamics in cylindrically confined colloidal suspensions
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