Dielectric Polarization and Particle Shape Effects

Sihvola, Ari

doi:https://doi.org/10.1155/2007/45090

Journal of Nanomaterials

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Volume 2007 | Article ID 045090 | https://doi.org/10.1155/2007/45090

Dielectric Polarization and Particle Shape Effects

Ari Sihvola¹

Academic Editor: Christian Brosseau

Received15 Feb 2007

Revised30 Apr 2007

Accepted30 May 2007

Published25 Jun 2007

Abstract

This article reviews polarizability properties of particles and clusters. Especially the effect of surface geometry is given attention. The important parameter of normalized dipolarizability is studied as function of the permittivity and the shape of the surface of the particle. For nonsymmetric particles, the quantity under interest is the average of the three polarizability dyadic eigenvalues. The normalized polarizability, although different for different shapes, has certain universal characteristics independent of the inclusion form. The canonical shapes (sphere, spheroids, ellipsoids, regular polyhedra, circular cylinder, semisphere, double sphere) are studied as well as the correlation of surface parameters with salient polarizability properties. These geometrical and surface parameters are essential in the material modeling problems in the nanoscale.

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Copyright

Copyright © 2007 Ari Sihvola. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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