PMID: 15244819Jul 13, 2004Paper

Electrokinetic behavior of two touching inhomogeneous biological cells and colloidal particles: effects of multipolar interactions

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
J P HuangG Q Gu

Abstract

We present a theory to investigate electrokinetic behavior, namely, electrorotation and dielectrophoresis under alternating current (ac) applied fields for a pair of touching inhomogeneous colloidal particles and biological cells. These inhomogeneous particles are treated as graded ones with physically motivated model dielectric and conductivity profiles. The mutual polarization interaction between the particles yields a change in their respective dipole moments, and hence in the ac electrokinetic spectra. The multipolar interactions between polarized particles are accurately captured by the multiple images method. In the point-dipole limit, our theory reproduces the known results. We find that the multipolar interactions as well as the spatial fluctuations inside the particles can affect the ac electrokinetic spectra significantly.

References

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Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J P HuangK W Yu
Feb 28, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J P HuangG Q Gu
Aug 15, 2002·Biochimica Et Biophysica Acta·Kanatip RatanachooMathuros Ruchirawat
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Mar 15, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J P HuangL Dong
Mar 15, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Lei GaoK W Yu
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Jun 6, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J P HuangMikko Karttunen

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