2003/01/31 by Lei Dong, L. Dong, G. Q. Gu +1 · 1 citation
Chemistry · Engineering · Physics and Astronomy · #Electrostatics and Colloid Interactions #Electrowetting and Microfluidic Technologies #Microfluidic and Bio-sensing Technologies #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.1103/physrevb.67.224205
published as Phys. Rev. B 67, 224205 (2003) · 14 pages, 1 eps figure; typos corrected, submitted to Phys. Rev. B
arxiv created 2003/04/25 · openalex publication_date 2003/06/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
We have studied the effective response of composites of spherical particles each having a dielectric profile which varies along the radius of the particles. We developed a first-principles approach to compute the dipole moment of the individual spherical particle and hence the effective dielectric response of a dilute suspension. The approach has been applied to two model dielectric profiles, for which exact solutions are available. Moreover, we used the exact results to validate the results from the differential effective dipole approximation, recently developed to treat graded spherical particles of an arbitrary dielectric profile. Excellent agreement between the two approaches were obtained. While the focus of this work has been on dielectric responses, the approach is equally applicable to analogous systems such as the conductivity and elastic problems.