abstract

• The correlation between the motion of pairs of colloidal particles confined in a planar pore is measured using optical microscopy. The systems studied here are aqueous suspensions of polystyrene spheres of diameter 1.9μm, interacting as effective hard spheres, confined between two parallel planar plates separated by 2.9μm. The lateral motion, along the plane parallel to the plates, of the particles is recorded with a time resolution of 30framess 1. From the short-time motion, the hydrodynamic diffusion coefficients are determined as functions of the interparticle distance for various particle concentrations. At low concentrations, when the static correlation between particles is also low, the diffusion coefficients exhibit some symmetry, and at higher concentrations they are modulated by the structure of static correlation. © 2012 IOP Publishing Ltd.

authors

• Arauz Lara Bernardo José Luis
• Bonilla-Capilla B.
• Ojeda López Miguel Ángel
• Ramírez-Saito A.

publication date

• 2012-01-01

published in

• Journal of Physics Condensed Matter  Journal

keywords

• Aqueous suspensions; Colloidal particle; Hard spheres; Hydrodynamic interaction; Interparticle distances; Lateral motion; Low concentrations; Particle concentrations; Polystyrene spheres; Time resolution; Colloids; Diffusion; Fluid dynamics; Optical microscopy; Polystyrenes; Suspensions (fluids)

Digital Object Identifier (DOI)

• 10.1088/0953-8984/24/46/464126

start page

end page

volume

• 24

issue

• 46