2004/12/16 by Alberto Imparato, A Imparato, Julian C. Shillcock +3
Biochemistry, Genetics and Molecular Biology · Chemistry · Physics and Astronomy · #Force Microscopy Techniques and Applications #Lipid Membrane Structure and Behavior #Surfactants and Colloidal Systems #cond-mat.soft
paper · pdf · doi:10.1209/epl/i2004-10382-3
published as Europhys. Lett., 69 (4), 650-656 (2005). · To appear on Europhysics Letters
arxiv created 2004/12/16 · openalex publication_date 2005/01/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
The elastic properties of two-component bilayer membranes are studied using a coarse-grain model for amphiphilic molecules. The two species of amphiphiles considered here differ only in their length. Molecular-dynamics simulations are performed in order to analyze the shape fluctuations of the two-component bilayer membranes and to determine their bending rigidity. Both the bending rigidity and its inverse are found to be nonmonotonic functions of the mole fraction x B of the shorter B-amphiphiles and, thus, do not satisfy a simple lever rule. The intrinsic area of the bilayer also exhibits a nonmonotonic dependence on x B and a maximum close to x B ≃ 1/2.