Surface-Density Transitions, Surface Elasticity and Rigidity, and Rupture Strength of Lipid Bilayer Membranes

摘要: Experimental advances have made possible direct measurements of cohesion, elasticity, and rigidity properties surfactant double-layer membranes in aqueous media. Mechanical -- tension for rupture (expansion limit), elastic compressibility surface are derived from pressurization giant single-walled vesicles by micropipets. Area as a function temperature provide explicit definition surface-density transitions at fixed state stress. Special crystalline-bilayer structures (e.g. ripple stiffness energy formation, shear viscosity) also measured. The effects mixtures phospholipids, cholesterol, simple polypeptides on these been established.