2002/12/31 by Lei Gao, Jiping Huang, J. P. Huang +1
Chemistry · Engineering · Physics and Astronomy · #Electrical and Bioimpedance Tomography #Electrostatics and Colloid Interactions #Microfluidic and Bio-sensing Technologies #cond-mat.soft #physics.bio-ph
paper · pdf · doi:10.1103/physreve.67.021910
published as Phys. Rev. E 67, 021910 (2003) · accepted by Phys. Rev. E
openalex publication_date 2003/02/24 · arxiv created 2005/05/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 antifield dispersion peaks on the volume fractions.