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Updated: Jul 14, 2026

On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids
Published on: March 2, 2012
Electrophoresis of colloidal dispersions in the low-salt regime
Vladimir Lobaskin1, Burkhard Dünweg, Martin Medebach
1Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.
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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