abstract

• The hydrodynamic hindering of a single-particle dynamics under total confinement is measured by optical microscopy. The three-dimensional trajectories of single-colloidal particles confined in spherical water globules of sizes only a few times the particle%27s diameter are tracked as they sample the entire volume of the globule. The hydrodynamic interactions between the particle and the spherical wall produce a dependence of the short-time diffusion on the particle%27s distance to the surface and an asymmetry in the radial and tangential components of the local diffusion coefficient, with the diffusion along the tangential direction being faster than along the radial direction. The latter decreasing close to the wall while the former being practically constant. © 2011 American Physical Society.
• The hydrodynamic hindering of a single-particle dynamics under total confinement is measured by optical microscopy. The three-dimensional trajectories of single-colloidal particles confined in spherical water globules of sizes only a few times the particle's diameter are tracked as they sample the entire volume of the globule. The hydrodynamic interactions between the particle and the spherical wall produce a dependence of the short-time diffusion on the particle's distance to the surface and an asymmetry in the radial and tangential components of the local diffusion coefficient, with the diffusion along the tangential direction being faster than along the radial direction. The latter decreasing close to the wall while the former being practically constant. © 2011 American Physical Society.

authors

• Arauz Lara Bernardo José Luis
• Armenta-Calderón R.
• Cervantes-Martínez A.E.
• Ojeda López Miguel Ángel
• Ramírez-Saito A.

publication date

• 2011-01-01

published in

• Physical Review E - Statistical, Nonlinear, and Soft Matter Physics  Journal

keywords

• Colloidal particle; Diffusion Coefficients; Hydrodynamic interaction; Radial direction; Single-particle dynamics; Spherical cells; Spherical wall; Tangential components; Tangential directions; Three-dimensional trajectories; Fluid dynamics; Hydrodynamics; Optical microscopy; Spheres; Diffusion

Digital Object Identifier (DOI)

• 10.1103/PhysRevE.83.030402

start page

end page

volume

• 83

issue

• 3