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Electrostatics of multilamellar vesicles: Legendre expansion and reaction-field Brownian dynamics

Summary: Electrostatics of multilamellar vesicles: Legendre expansion
and reaction-field Brownian dynamics
Veaceslav Zaloja)
and Noam Agmon
The Fritz Haber Research Center, Department of Physical Chemistry, The Hebrew University,
Jerusalem 91904, Israel
Received 23 May 1997; accepted 10 October 1997
An analytic expression for the electrostatic potential of a point charge within a concentric
multilayered dielectric medium is derived in terms of a Legendre expansion. A novel Brownian
dynamics algorithm for solving the Poisson equation for the reaction-field potential of charges near
dielectric interfaces is presented. To test both the computed and analytic solutions, the reaction-field
potential and self-energy of a charge within a liposome are calculated and compared. 1998
American Institute of Physics. S0021-9606 98 52103-4
Biological membranes are phospholipid bilayers that en-
close the aqueous contents of cells and organelles. Charge
transfer and ion diffusion processes within and across such
membranes are pivotal in a variety of biophysical processes.
For example, chloroplasts in green plants and mitochondria
in eucariotic cells possess an internal membrane folded


Source: Agmon, Noam - Institute of Chemistry, Hebrew University of Jerusalem


Collections: Chemistry