title: Slow dynamics of a colloidal lamellar phase.
abstract: We used x-ray photon correlation spectroscopy to study the dynamics in the lamellar phase of a platelet suspension as a function of the particle concentration. We measured the collective diffusion coefficient along the director of the phase, over length scales down to the interparticle distance, and quantified the hydrodynamic interaction between the particles. This interaction sets in with increasing concentration and can be described qualitatively by a simplified model. No change in the microscopic structure or dynamics is observed at the transition between the fluid and the gel-like lamellar phases.
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, 91405 Orsay, France. constantin@lps.u-psud.fr
authors.forename: Doru
authors.initials: D
authors.lastname: Constantin
authors.forename: Patrick
authors.initials: P
authors.lastname: Davidson
authors.forename: Éric
authors.initials: É
authors.lastname: Freyssingeas
authors.forename: Anders
authors.initials: A
authors.lastname: Madsen