Thermal undulations of lipid bilayers relax by intermonolayer friction at submicrometer length scales |
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Authors: | Shkulipa S A den Otter W K Briels W J |
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Institution: | Computational Biophysics, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands. |
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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 approximately -0.1 microm. |
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