Nanoscale surface relaxation of a membrane stack

Hamutal Bary-Soroker*, Haim Diamant

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Recent measurements of the short-wavelength (∼1-100 nm) fluctuations in stacks of lipid membranes have revealed two distinct relaxations: a fast one (decay rate of ∼0.1 ns-1), which fits the known baroclinic mode of bulk lamellar phases, and a slower one (∼1-10 μ s-1) of unknown origin. We show that the latter is accounted for by an overdamped capillary mode, depending on the surface tension of the stack and its anisotropic viscosity. We thereby demonstrate how the dynamic surface tension of membrane stacks could be extracted from such measurements.

Original languageEnglish
Article number042401
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number4
StatePublished - 11 Oct 2007


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