Nano-domain formation in charged membranes: Beyond the Debye-H�ckel approximation

Ryuichi Okamoto, Naofumi Shimokawa, Shigeyuki Komura

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Abstract

We investigate the microphase separation in a membrane composed of charged lipids, by taking into account explicitly the electrostatic potential and the ion densities in the surrounding solvent. While the overall (membrane and solvent) charge neutrality is assumed, the membrane can have a non-zero net charge. The static structure factor in the homogeneous state is analytically obtained without using the Debye-H�ckel approximation and is found to have a peak at an intermediate wave number. For a binary membrane composed of anionic and neutral lipids, the characteristic wave number corresponds to a scale from several to tens of nanometers. Our numerical calculation further predicts the existence of nano-domains in charged membranes.

Original languageEnglish
Article number28002
JournalEPL
Volume114
Issue number2
DOIs
Publication statusPublished - Apr 1 2016
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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