کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
598409 1454088 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrostatic and mechanical properties of a flat lipid bilayer containing ionic lipids: Possibility for formation of domains with different surface charges
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Electrostatic and mechanical properties of a flat lipid bilayer containing ionic lipids: Possibility for formation of domains with different surface charges
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 282–283, 20 July 2006, Pages 423–434
نویسندگان
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