Colloidal diffusion inside a spherical cell
Condensed Matter journal club
Colloidal diffusion inside a spherical cell
- Event time: 11:30am
- Event date: 6th May 2011
- Speaker: Dr Andrew Schofield (School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
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'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 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.PHYSICAL REVIEW E 83 030402(R) (2011)
Authors
A. E. Cervantes-Martinez, A. Ramirez-Saito, R. Armenta-Calderon M. A. Ojeda-Lopez, and J. L. Arauz-Lara
About Condensed Matter journal club
Given the diversity of research in the CM group, chosen topics vary widely. We tend to stick to high-impact journals - Nature, Science, PNAS and PRL have been popular - but this is not prescriptive..