Thermal undulations of lipd bilayers relax by intermonolayer friction at sub-micrometer length scales

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Abstract

The time correlation functions of the thermal undulations of a lipid membrane have been studied by molecular dynamics simulations of a coarse-grained bilayer model. We observe a double-exponential decay, with relaxation rates in good agreement with the theory by Seifert and Langer, [Europhys. Lett. 23, 71 (1993)]. Intermonolayer friction resulting from local velocity differences between the two monolayers is shown to be the dominant dissipative mechanism for fluctuations with wave lengths below ~0.1 µm.
Original languageEnglish
Article number178302
Number of pages4
JournalPhysical review letters
Volume96
Issue number17
DOIs
Publication statusPublished - 2006

Keywords

  • METIS-233733
  • IR-59082

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