Bingham, RJ, Smye, SW and Olmsted, PD (2015) Dynamics of an asymmetric bilayer lipid membrane in a viscous solvent. EPL (Europhysics Letters), 111 (1). ISSN 1286-4854
Abstract
Bilayer lipid membranes (BLMs) are an essential component of many biological systems, forming a functional barrier between the cell and the surrounding environment. When the membrane relaxes from a structural perturbation, the dynamics of the relaxation depends on the bilayer structure. We present a model of a BLM in a viscous solvent, including an explicit description of a 'thick' membrane, where the fluctuations in the thickness of a monolayer leaflet are coupled to changes in the lipid density within that monolayer. We find dispersion relations describing three intuitive forms of bilayer motion, including a mode describing motion of the intermonolayer surface not noted previously in the literature. Two intrinsic length scales emerge that help characterise the dynamics; the well known Saffman-Delbruck length and another, $\ell_r$, resulting from the intermonolayer friction. The framework also allows for asymmetry in the BLM parameters between the monolayer leaflets, which is found to couple dynamic modes of bilayer motion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, European Physical Society. This is an author produced version of a paper published in EPL (Europhysics Letters). Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | cond-mat.soft; cond-mat.soft; cond-mat.stat-mech; physics.bio-ph; physics.flu-dyn |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Genetics, Health and Therapeutics (LIGHT) > Academic Unit of Medical Physics (Leeds) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Jul 2015 12:46 |
Last Modified: | 23 Jun 2016 01:53 |
Published Version: | http://dx.doi.org/10.1209/0295-5075/111/18004 |
Status: | Published |
Publisher: | European Physical Society |
Identification Number: | 10.1209/0295-5075/111/18004 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:88234 |