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arXiv 0905.3855cond-mat.softcond-mat.stat-mech
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介质不均匀性下的强耦合静电场

Strong Coupling Electrostatics in the Presence of Dielectric Inhomogeneities

Y. S. Jho, M. Kanduc, A. Naji, R. Podgornik, M. W. Kim, P. A. Pincus

摘要:

本文研究了两个有限厚度的同电荷薄膜在高介电常数介质中的强耦合相互作用。应用广义SC理论和广泛的蒙特卡罗模拟研究了该系统中多个介质不连续性引起的镜像电荷效应。这些影响导致强烈的反相拥挤在中心区域的表面间空间时,增加溶剂/膜的介电失配和改变膜的相互作用从吸引到排斥在小的分离。这些功能同意定量与SC理论在升高的耦合或介电失配的反离子周围的相关孔是大于中央反离子层的厚度。

英文摘要:

We study the strong-coupling (SC) interaction between two like-charged membranes of finite thickness embedded in a medium of higher dielectric constant. A generalized SC theory is applied along with extensive Monte-Carlo simulations to study the image charge effects induced by multiple dielectric discontinuities in this system. These effects lead to strong counterion crowding in the central region of the inter-surface space upon increasing the solvent/membrane dielectric mismatch and change the membrane interactions from attractive to repulsive at small separations. These features agree quantitatively with the SC theory at elevated couplings or dielectric mismatch where the correlation hole around counterions is larger than the thickness of the central counterion layer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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