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Electrorotation and levitation of cells and colloidal particles

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Sauer,  Friedrich A.
Max Planck Institute of Biophysics, Max Planck Society;

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Schwan,  Herman P.
Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104–6392, United States;
Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Foster, K. R., Sauer, F. A., & Schwan, H. P. (1992). Electrorotation and levitation of cells and colloidal particles. Biophysical Journal, 63(1), 180-190. doi:10.1016/S0006-3495(92)81588-6.


Cite as: http://hdl.handle.net/21.11116/0000-0009-6423-F
Abstract
We review dielectrophoretic forces on cells and colloidal particles, emphasizing their use for manipulating and characterizing the electrical properties of suspended particles. Compared with dielectric spectroscopy, these methods offer a measure of independence from electrode artifacts and mixture theory. On the assumption that the particles can be modeled as uniform dielectric objects with effective dielectric properties, a simple theory can be developed for the frequency variation in the field-induced forces. For particles exhibiting counterion polarization, dielectrophoretic forces differ considerably from predictions of this theory at low frequencies, apparently because of double layer phenomena.