Electrorotation in graded colloidal suspensions

J.P. Huang, K.W. Yu, G.Q. Gu, M.E.J. Karttunen

    Research output: Contribution to journalArticleAcademicpeer-review

    72 Citations (Scopus)
    288 Downloads (Pure)


    Biological cells can be treated as composites of graded material inclusions. In addition to biomaterials, graded composites are important in more traditional materials science. In this paper, we investigate the electrorotation spectrum of a graded colloidal suspension in an attempt to discuss its dielectric properties. For that, we use the recently obtained differential effective dipole approximation and generalize it for nonspherical particles. We find that variations in the conductivity profile may make the characteristic frequency redshifted and have also an effect on the rotation peak. On the other hand, variations in the dielectric profile may enhance the rotation peak, but do not have any significant effect on the characteristic frequency. In the end, we apply our theory to fit experimental data obtained for yeast cells and find good agreement.
    Original languageEnglish
    Pages (from-to)051405/1-1/5
    Number of pages5
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Issue number5
    Publication statusPublished - 2003


    Dive into the research topics of 'Electrorotation in graded colloidal suspensions'. Together they form a unique fingerprint.

    Cite this