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  • Title: Dynamic electrophoresis of a spherical dispersion of soft particles subject to a stress-jump condition.
    Author: Min WL, Lee E, Hsu JP.
    Journal: J Colloid Interface Sci; 2006 Jul 01; 299(1):464-71. PubMed ID: 16524586.
    Abstract:
    The dynamic mobility of a spherical dispersion of soft particles, where a particle comprises a rigid core and a membrane layer, is evaluated for the case when the shear stress across the membrane layer-liquid interface is discontinuous, the so-called stress-jump condition. We show that, due to the effect of double-layer deformation, the magnitude of the dynamic mobility of a particle has a local maximum and the corresponding phase angle has a negative (phase lead) local minimum at a low to medium level of the frequency of the applied electric field. This effect becomes insignificant if the frequency of the applied electric field is sufficiently high. The stress-jump condition may lead to a significant influence on the drag, and consequently the mobility of a particle. The degree of influence depends upon the sign of the stress-jump coefficient and the charged conditions of the membrane layer of the particle.
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