Local influence of boundary conditions on a confined supercooled colloidal liquid

Abstract

We study confined colloidal suspensions as a model system which approximates the behavior of confined small molecule glass-formers. Dense colloidal suspensions become glassier when confined between parallel glass plates. We use confocal microscopy to study the motion of confined colloidal particles. In particular, we examine the influence particles stuck to the glass plates have on nearby free particles. Confinement appears to be the primary influence slowing free particle motion, and proximity to stuck particles causes a secondary reduction in the mobility of free particles. Overall, particle mobility is fairly constant across the width of the sample chamber, but a strong asymmetry in boundary conditions results in a slight gradient of particle mobility.

For conference proceedings, "Dynamics in Confinement", Grenoble, March 2010

References in corpus (4)

• Probing the equilibrium dynamics of colloidal hard spheres above the mode-coupling glass transition
• Dynamics and structure of an aging binary colloidal glass
• Tuning density profiles and mobility of inhomogeneous fluids
• Influence of Confinement on Dynamical Heterogeneities in Dense Colloidal Samples

Cited by in corpus (8)

• The Physics of the Colloidal Glass Transition
• Mode-coupling theory of the glass transition for confined fluids
• Influence of Confinement on Dynamical Heterogeneities in Dense Colloidal Samples
• Boundary mobility controls glassiness of confined colloidal liquids
• Impact of surface roughness on diffusion of confined fluids
• The effect of boundary adaptivity on hexagonal ordering and bistability in circularly confined quasi hard discs
• A Comment on the Scale Length Validity of the Position Dependent Diffusion Coefficient Representation of Structural Heterogeneity
• Mode-coupling theory of the glass transition for colloidal liquids in slit geometry