Onset of anomalous diffusion in colloids confined to quasi-monolayers

Abstract

It has been recently shown that a colloidal monolayer, e.g., formed at a fluid interface or by means of a suitable confining potential, exhibits anomalous collective diffusion. This is a consequence of the hydrodynamic interactions mediated by the three-dimensional (3D) ambient fluid when the particles are confined to reside on a two-dimensional (2D) manifold. We study theoretically and with numerical simulations the crossover from normal to anomalous diffusion as the particles are, in real systems, confined by a 3D external potential and thus have the possibility to fluctuate out of the 2D manifold, thus forming actually a quasi-monolayer.

13 pages, 9 figures

References in corpus (3)

• Dynamics of swimming bacteria at complex interfaces
• Dynamic Density Functional Theory with hydrodynamic interactions and fluctuations
• Signature of the time-dependent hydrodynamic interactions on the collective diffusion in colloidal monolayers

Cited by in corpus (6)

• Collective motion in a sheet of microswimmers
• Solvent hydrodynamics enhances the collective diffusion of membrane lipids
• Hydrodynamic fluctuations in quasi-two dimensional diffusion
• Structural properties of liquids in extreme confinement
• Theory of anomalous collective diffusion in colloidal monolayers on a spherical interface
• Hydrodynamic interactions in a binary-mixture colloidal monolayer