Modeling of the Electric Field-Induced Birefringence of Vesicles

Autor:	Viktor Peikov, Zoltan A. Schelly
Rok vydání:	2004
Předmět:	Birefringence Field (physics) Axial ratio Chemistry Bilayer Vesicle technology industry and agriculture Analytical chemistry Molecular physics Surfaces Coatings and Films Electric field Flow birefringence Materials Chemistry Physical and Theoretical Chemistry Lipid bilayer
Zdroj:	The Journal of Physical Chemistry B. 108:9357-9363
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp0369488
Popis:	Electric birefringence of unilamellar lipid vesicles, elongated in the direction of the applied field E, is modeled for a low degree of deformation to a prolate ellipsoid of the original spherical shells. The existing theory for water-in-oil microemulsion is adapted, and the intrinsic birefringence of the lipid membrane and the form birefringence of the aqueous inner compartment of the vesicle are taken into account. Deformation under both constant surface area and constant volume conditions are considered, but thinning of the bilayer at the polar caps and rotational/orientational effects are neglected. For illustration of the utility of the theoretical results, the extent of elongation of large unilamellar vesicles (LUV), prepared from the zwitterionic DOPC (dioleoylphosphatidylcholine), is calculated based on available experimentally measured induced birefringence data. With the use of reasonable values for the refractive indexes of the membrane, the axial ratio P of the deformed vesicle is found to be ...
Databáze:	OpenAIRE
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