Journal ArticleDOI
Low-Frequency Dielectrophoresis and the Polarization Interaction of Uncharged Spherical Particles with an Induced Debye Atmosphere of Arbitrary Thickness
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In this paper, a class of systems characterized by the formation of transverse linear aggregates of particles is determined, where the aggregates are weakly conducting media with nonconducting particles but more polar than the medium.Abstract:
The electroosmotic component of the mutual dielectrophoresis is accounted for in the theory of the polarization interaction of uncharged particles. Previously, for the case when the polarization charge layer thickness is small as compared with the particle radius, it was shown that the electro-osmosis exerts significant effect on the motion of a particle in a nonuniform field (external or induced by a neighboring particle). The electro-osmosis in the induced Debye atmosphere of arbitrary thickness is considered in this paper. A class of systems characterized by the formation of transverse linear aggregates of particles is determined. The aggregates are weakly conducting media with nonconducting particles but more polar than the medium. The possibility of the occurrence of transverse electrocoagulation structures, which was originally obtained by us using the heuristic approach, is supported by results obtained in the solution of the electrohydrodynamic problem of the long-range interaction of polarized particles. The results obtained confirm high efficiency of the heuristic method used.read more
Citations
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Journal ArticleDOI
Induced-Charge Electrokinetic Phenomena: Theory and Microfluidic Applications
Martin Z. Bazant,Todd M. Squires +1 more
TL;DR: The general, physical description of "induced-charge electro-osmosis" (ICEO), the nonlinear electrokinetic slip at a polarizable surface, is given in the context of some new techniques for microfluidic pumping and mixing.
Journal ArticleDOI
Steric effects in the dynamics of electrolytes at large applied voltages. I. Double-layer charging.
TL;DR: In this paper, the authors consider steric effects on diffuse charge dynamics in the absence of electro-osmotic flow and analyze two simple models for the charging of a thin double layer which must form a condensed layer of close-packed ions near the surface at high voltage.
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Steric effects in the dynamics of electrolytes at large applied voltages: I. Double-layer charging
TL;DR: This two-part series considers steric effects on diffuse charge dynamics (in the absence of electro-osmotic flow) and two simple models for the charging of a thin double layer, which must form a condensed layer of close-packed ions near the surface at high voltage.
Journal ArticleDOI
Breaking symmetries in induced-charge electro-osmosis and electrophoresis
Todd M. Squires,Martin Z. Bazant +1 more
TL;DR: In this paper, the authors examine the consequences of broken geometric and field symmetries upon the ICEO flow around conducting bodies and demonstrate that spatial asymmetry generally leads to a net pumping of fluid past the body by ICEO, or, in the case of a freely suspended colloidal particle, translation and/or rotation by ICEP.
Journal Article
Breaking symmetries in induced-charge electro-osmosis and electrophoresis
Todd M. Squires,Martin Z. Bazant +1 more
TL;DR: In this article, the authors examine the consequences of broken geometric and field symmetries upon the ICEO flow around conducting bodies and demonstrate that spatial asymmetry generally leads to a net pumping of fluid past the body by ICEO, or, in the case of a freely suspended colloidal particle, translation and/or rotation by ICEP.
References
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Journal ArticleDOI
The classical theory of fields
TL;DR: The principle of relativity Relativistic mechanics Electromagnetic fields electromagnetic waves as discussed by the authors The propagation of light The field of moving charges Radiation of electromagnetic waves Particle in a gravitational field The gravitational field equation
Journal ArticleDOI
Polarization interaction of disperse particles with not thin debye atmosphere
TL;DR: In this paper, the double layer nonlinear polarization was analyzed in terms of the electric field of the equilibrium double layer and the potential of the double-layer electric field, and it was shown that in suspension of polar nonconductive particles in the less polar medium, the orientation of the duplet perpendicular to field is more advantageous than along the field; the attraction of the charged polar particles is substituted by the repulsion with the particle ς -potential increase both for longitude duplet ( ς = 2.5 ǫ ) and for transverse duplet
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Breaking symmetries in induced-charge electro-osmosis and electrophoresis
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