Display options
Cite
Liang E, Smith RL, Clague DS. Dielectrophoretic manipulation of finite sized species and the importance of the quadrupolar contribution. Phys Rev E Stat Nonlin Soft Matter Phys. 2004;70(6):066617doi: 10.1103/PhysRevE.70.066617.
Liang, E., Smith, R. L., & Clague, D. S. (2004). Dielectrophoretic manipulation of finite sized species and the importance of the quadrupolar contribution. Physical review. E, Statistical, nonlinear, and soft matter physics, 70(6), 066617. https://doi.org/10.1103/PhysRevE.70.066617
Liang, Enzhu, et al. "Dielectrophoretic manipulation of finite sized species and the importance of the quadrupolar contribution." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 70,6 (2004): 066617. doi: https://doi.org/10.1103/PhysRevE.70.066617
Liang E, Smith RL, Clague DS. Dielectrophoretic manipulation of finite sized species and the importance of the quadrupolar contribution. Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Dec;70(6):066617. doi: 10.1103/PhysRevE.70.066617. Epub 2004 Dec 17. PMID: 15697536.
Copy Download .nbib Format: NLM
Share it on

Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Dec;70(6):066617. doi: 10.1103/PhysRevE.70.066617. Epub 2004 Dec 17.

Dielectrophoretic manipulation of finite sized species and the importance of the quadrupolar contribution.

Physical review. E, Statistical, nonlinear, and soft matter physics

Enzhu Liang, Rosemary L Smith, David S Clague

Affiliations

  1. Department of Electrical Engineering, University of California-Davis, 1 Shields Ave., Davis, CA 95616, USA.

PMID: 15697536 DOI: 10.1103/PhysRevE.70.066617

Abstract

Dielectrophoresis (DEP) is the movement of polarizable species in a nonuniform electric field. DEP is used to attract (positive DEP) to or repel from (negative DEP) regions of high field intensity and is useful for manipulating species, including biological species. Current theoretical and numerical approaches used to predict the response to DEP forces assume that the target species is a point particle; however, in practice, the target species is of finite size, e.g., macromolecules, spores and assay beads. To elucidate the importance of target species size effects, higher order terms in the DEP force multipole expansion must be considered [Electrophoresis 23, 1973 (2002)]]. In this paper, we used the method of Green's function to derive and explore the importance of the quadrupolar contribution to the DEP forces acting on finite-sized species produced by a planar, interdigitated array of electrodes. Based on the analysis, it was found, for example, that at a fixed height of 20 mum in an interdigitated DEP array with an electrode width and spacing of 20 mum energized by a 10 Vp p, 1.0 MHz ac signal, the quadrupolar contribution to the total DEP force was 5% for a latex bead with 4.2 mum in radius and 10% for the one with 6 mum in radius. For a fixed, fractional quadrupolar contribution, beta , both the exact calculation and the scaling estimate elucidate that the critical size of particle increase linearly with the electrode width (and spacing) at a fixed height, while the critical particle radius increases with a square-root dependence on the width height above the electrode in the electrode array.

Publication Types