title: The double fixed charge membrane. Low frequency dielectric dispersion.
abstract: An analysis is made of the AC characteristics of a membrane consisting of two fixed charge regions of opposite sign, in contact. It is shown that the equivalent parallel capacitance and conductance of such a membrane undergo a strong dispersion at low frequencies. The dielectric dispersion is a result of polarization effects in the diffusion of coions in each of the two fixed charge lattices. This, at low frequencies, gives rise to a very large diffusion capacitance. The form of the dispersion characteristics is very similar to those observed for synthetic-fused anion-cation membranes and various cellular membranes.
mesh_terms: D004553:Electric Conductivity; D004560:Electricity; D007477:Ions; D008433:Mathematics; D008566:Membranes; D008962:Models, Theoretical
chemical_list: D007477:Ions