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Updated: Jul 31, 2026

AC Electrokinetic Phenomena Generated by Microelectrode Structures
Published on: July 28, 2008
Electrohydrodynamic effects in continuous flow electrophoresis
P H Rhodes1, R S Snyder, G O Roberts
1National Aeronautics and Space Administration, George C. Marshall Space Flight Center, Huntsville, Alabama 35812.
Abstract:
We demonstrate experimentally and theoretically the importance of electrohydrodynamic (EHD) flows in continuous-flow electrophoresis (CFE) separations. These flows are associated with variations in the conductivity or dielectric constant, and are quadratic in the field strength. They appear to be the main cause of extraneous and undesired flows in CFE which have degraded separation performance and have until now not been explained. We discuss the importance of EHD flows relative to other effects. We also describe possible techniques for reducing the associated degradation of CFE separations.
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