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首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >Electrostatic and mechanical properties of a flat lipid bilayer containing ionic lipids - Possibility for formation of domains with different surface charges
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Electrostatic and mechanical properties of a flat lipid bilayer containing ionic lipids - Possibility for formation of domains with different surface charges

机译：含离子脂质的平坦脂质双层的静电和机械性能-形成具有不同表面电荷的结构域的可能性

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摘要

The electrostatic and the mechanical properties of a flat lipid bilayer, containing ionic lipid, are studied theoretically. The degree of dissociation of the molecules of the ionic lipid and the free energy of the system due to the electrostatic interactions are obtained as a function of the relative concentration of the ionic lipid in the membrane. The classical approach to the calculation of the free energy of the electric double layer, used by Verwey and Overbeek, is developed in order to take into account that the membrane is not a reservoir of ions. A concentration interval of the ionic lipid, where phase separation into domains with different surface charges appears and the existence of a particular concentration of the ionic lipid, revealing critical properties, are predicted. The contribution of the electrostatic interactions to the stretching elasticity of the bilayer is determined. (c) 2005 Elsevier B.V. All rights reserved.
机译：理论上研究了包含离子脂质的扁平脂质双层的静电和机械性能。获得离子脂质分子的解离度和由于静电相互作用而导致的系统自由能，其是膜中离子脂质相对浓度的函数。 Verwey和Overbeek使用了一种经典的计算双电层自由能的方法，目的是考虑到膜不是离子的储层。预测了离子脂质的浓度间隔，其中出现相分离成具有不同表面电荷的域，并且预测了特定浓度的离子脂质的存在，揭示了关键性质。确定静电相互作用对双层的拉伸弹性的贡献。 （c）2005 Elsevier B.V.保留所有权利。

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