Undulation instability of lipid membranes under an electric field

Details Undulation instability of lipid membranes under an electric field Undulation instability of lipid membranes under an electric field

2001-06-29

arxiv.org/abs/cond-mat/0106634v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.88.128102

The influence of an 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 and the subsequent force on the frame are derived and the electrohydrodynamic instability of a free floating membrane is also studied. We find a most unstable mode of undulation, of wavelength in the $\mu m$ range, connected to the crossover between membrane and solvent dominated dissipations.

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