Theory of electrical conductivities of ferrogels

Details Theory of electrical conductivities of ferrogels Theory of electrical conductivities of ferrogels

2004-07-25

arxiv.org/abs/physics/0407129v2

J. Phys. Chem. B, vol. 108, 13901 (2004)

Physics

Chemical Physics

15 pages, 2 figures

Scientific paper

Conductive organic polymers can be formulated with polymers that incorporate fine dispersed metallic particles. In this work, we present a general model for ferrogels which are chemically cross-linked polymer networks swollen with a ferrofluid. Our aim is to study the effect of the shape and/or material (conductivity) anisotropy on the effective electrical conductivity of the ferrogel in the presence of an external magnetic field. Our theory can reproduce the known results, and provides a link between the particle property and orientation distribution and the effective electrical conductivity. To this end, we find that material (conductivity) anisotropies are more important to yield a high effective electrical conductivity than shape anisotropies, while magnetic fields can offer a correction.

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