Electrodeless dielectrophoresis of single- and double-stranded DNA

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Abstract

Dielectrophoretic trapping of molecules is typically carried out using metal electrodes to provide high field gradients. In this paper we demonstrate dielectrophoretic trapping using insulating constrictions at far lower frequencies than are feasible with metallic trapping structures because of water electrolysis. We demonstrate that electrodeless dielectrophoresis (EDEP) can be used for concentration and patterning of both single-strand and double-strand DNA. A possible mechanism for DNA polarization in ionic solution is discussed based on the frequency, viscosity, and field dependence of the observed trapping force.

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Chou, C. F., Tegenfeldt, J. O., Bakajin, O., Chan, S. S., Cox, E. C., Darnton, N., … Austin, R. H. (2002). Electrodeless dielectrophoresis of single- and double-stranded DNA. Biophysical Journal, 83(4), 2170–2179. https://doi.org/10.1016/S0006-3495(02)73977-5

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