dorsal/arxiv
View SchemaDielectrophoresis of charged colloidal suspensions
| Authors | J. P. Huang, Mikko Karttunen, K. W. Yu, L. Dong |
|---|---|
| Categories | |
| ArXiv ID | physics/0211055 |
| URL | https://arxiv.org/abs/physics/0211055 |
| DOI | 10.1103/PhysRevE.67.021403 |
| Journal | Phys. Rev. E 67, 021403 (2003) |
Abstract
We present a theoretical study of dielectrophoretic (DEP) crossover spectrum of two polarizable particles under the action of a nonuniform AC electric field. For two approaching particles, the mutual polarization interaction yields a change in their respective dipole moments, and hence, in the DEP crossover spectrum. The induced polarization effects are captured by the multiple image method. Using spectral representation theory, an analytic expression for the DEP force is derived. We find that the mutual polarization effects can change the crossover frequency at which the DEP force changes sign. The results are found to be in agreement with recent experimental observation and as they go beyond the standard theory, they help to clarify the important question of the underlying polarization mechanisms.
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"abstract": "We present a theoretical study of dielectrophoretic (DEP) crossover spectrum\nof two polarizable particles under the action of a nonuniform AC electric\nfield. For two approaching particles, the mutual polarization interaction\nyields a change in their respective dipole moments, and hence, in the DEP\ncrossover spectrum. The induced polarization effects are captured by the\nmultiple image method. Using spectral representation theory, an analytic\nexpression for the DEP force is derived. We find that the mutual polarization\neffects can change the crossover frequency at which the DEP force changes sign.\nThe results are found to be in agreement with recent experimental observation\nand as they go beyond the standard theory, they help to clarify the important\nquestion of the underlying polarization mechanisms.",
"arxiv_id": "physics/0211055",
"authors": [
"J. P. Huang",
"Mikko Karttunen",
"K. W. Yu",
"L. Dong"
],
"categories": [
"physics.chem-ph",
"physics.bio-ph"
],
"doi": "10.1103/PhysRevE.67.021403",
"journal_ref": "Phys. Rev. E 67, 021403 (2003)",
"title": "Dielectrophoresis of charged colloidal suspensions",
"url": "https://arxiv.org/abs/physics/0211055"
},
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