Delorme N, Bardeau J-F, Carrière D, Dubois M, Gourbil A, Mohwald H, Zemb Th, Fery A
Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany.
J Phys Chem B. 2007 Mar 15;111(10):2503-5. doi: 10.1021/jp068252v. Epub 2007 Feb 22.
We address the issue of the origin of the bending rigidity of a charged membrane formed from amphiphilic molecules. Electrostatic effects are investigated by direct measurement of the force necessary to deform a catanionic membrane as function of the ionic strength of the medium by means of an atomic force microscope (AFM). Using continuum mechanical modeling of membrane deformation, we derive the bending rigidity of the catanionic membranes and monitor for the first time its decrease in response to increasing salt concentration.
我们研究了由两亲分子形成的带电膜弯曲刚度的起源问题。通过原子力显微镜（AFM）直接测量使阴阳离子膜变形所需的力随介质离子强度的变化，来研究静电效应。利用膜变形的连续介质力学模型，我们推导出阴阳离子膜的弯曲刚度，并首次监测到其随盐浓度增加而降低的情况。
