Sens Pierre, Isambert H
CNRS-Institut Charles Sadron, 6 rue Boussingault, 67083 Strasbourg, France.
Phys Rev Lett. 2002 Mar 25;88(12):128102. doi: 10.1103/PhysRevLett.88.128102. Epub 2002 Mar 7.
The influence of an external electric field on a poorly conductive membrane such as a lipid bilayer is studied theoretically. The unbalanced electric stress created by an ionic current across a non-perfectly flat membrane gives rise to a destabilizing surface energy enhancing undulations. The deformation of a membrane attached to a frame is derived and the electrohydrodynamic instability of a free floating membrane is studied. We find a most unstable mode of undulation, of wavelength in the microm range, connected to the crossover between membrane and solvent dominated dissipations.
从理论上研究了外部电场对脂质双层等低导电膜的影响。跨不完全平整膜的离子电流产生的不平衡电应力会导致表面能不稳定，从而增强波动。推导了附着在框架上的膜的变形，并研究了自由漂浮膜的电流体动力学不稳定性。我们发现了一种最不稳定的波动模式，其波长在微米范围内，与膜和溶剂主导的耗散之间的转变有关。
