Electrophoresis of colloidal dispersions in the low-salt regime.
We study the electrophoretic mobility of spherical charged colloids in a low-salt suspension as a function of the colloidal concentration. Using an effective particle charge and a reduced screening parameter, we map the data for systems with different particle charges and sizes, including numerical simulation data with full electrostatics and hydrodynamics and experimental data for latex dispersions, on a single master curve. We observe two different volume fraction-dependent regimes for the electrophoretic mobility that can be explained in terms of the static properties of the ionic double layer.
Lobaskin
Vladimir
V
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.
Dünweg
Burkhard
B
Medebach
Martin
M
Palberg
Thomas
T
Holm
Christian
C
D002623:Chemistry Techniques, Analytical; D003102:Colloids; D003198:Computer Simulation; D004586:Electrophoresis; D007840:Latex / Q000737:chemistry*; D008956:Models, Chemical; D012492:Salts
D003102:Colloids; D007840:Latex; D012492:Salts