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Electrophoresis of colloidal dispersions in the low-salt regime

Vladimir Lobaskin·Burkhard Duenweg·Martin Medebach·Thomas Palberg·Christian Holm
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Abstract

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.

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Vladimir Lobaskin, Burkhard Duenweg, Martin Medebach, Thomas Palberg, Christian Holm. 2006-12-15. Electrophoresis of colloidal dispersions in the low-salt regime. https://doi.org/10.1103/physrevlett.98.176105

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