带电膜片周围离子云的极化率。

Polarizability of the ionic cloud around a charged membrane sheet.

作者信息

Papp E

机构信息

Department of Atomic Physics, Eötvös Loránd University, Budapest, H-1088 Puskin u 5-7, Hungary.

出版信息

Biophys Chem. 1985 Mar;21(3-4):243-8. doi: 10.1016/0301-4622(85)80011-9.

DOI:10.1016/0301-4622(85)80011-9

PMID:17007775

Abstract

The polarizability of the ionic cloud around a charged membrane sheet parallel to the surface is calculated. The membrane is modeled as an infinitely thin and long strip of width 2d'. The Poisson-Boltzmann equation is solved with an external electric field as a perturbation. The polarizability is given in closed integral form, with numerical results. At higher salt concentration the polarizability varies approximately as kappa(-3), where kappa is the Debye-Hückel constant. The given theoretical result can account for the a.c. electrodichroism of purple membrane suspensions.

摘要

计算了平行于表面的带电膜片周围离子云的极化率。该膜被建模为宽度为2d'的无限薄且长的条带。以外部电场作为微扰求解泊松 - 玻尔兹曼方程。极化率以封闭积分形式给出，并附有数值结果。在较高盐浓度下，极化率近似随κ^(-3)变化，其中κ是德拜 - 休克尔常数。给出的理论结果可以解释紫色膜悬浮液的交流电极化二色性。