Theory of ac electrokinetic behavior of spheroidal cell suspensions with an intrinsic dispersion
arXiv:cond-mat/0212005 · doi:10.1103/PhysRevE.67.021910
Abstract
The dielectric dispersion, dielectrophoretic (DEP) and electrorotational (ER) spectra of spheroidal biological cell suspensions with an intrinsic dispersion in the constituent dielectric constants are investigated. By means of the spectral representation method, we express analytically the characteristic frequencies and dispersion strengths both for the effective dielectric constant and the Clausius-Mossotti factor (CMF). We identify four and six characteristic frequencies for the effective dielectric spectra and CMF respectively, all of them being dependent on the depolarization factor (or the cell shape). The analytical results allow us to examine the effects of the cell shape, the dispersion strength and the intrinsic frequency on the dielectric dispersion, DEP and ER spectra. Furthermore, we include the local-field effects due to the mutual interactions between cells in a dense suspension, and study the dependence of co-field or anti-field dispersion peaks on the volume fractions.
arXiv commentaccepted by Phys. Rev. E
References in corpus (1)
Cited by in corpus (4)
- Electrorotation in graded colloidal suspensions
- Effective nonlinear optical properties of composite media of graded spherical particles
- Electrokinetic behavior of two touching inhomogeneous biological cells and colloidal particles: Effects of multipolar interactions
- Dielectric behaviour of graded spherical cells with an intrinsic dispersion