Thakkar, Foram M. ; Maiti, Prabal K. ; Kumaran, V. ; Ayappa, K. G. (2011) Verifying scalings for bending rigidity of bilayer membranes using mesoscale models Soft Matter, 7 (8). pp. 3963-3966. ISSN 1744-683X
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Official URL: http://pubs.rsc.org/en/content/articlelanding/2011...
Related URL: http://dx.doi.org/10.1039/C0SM00876A
Abstract
The bending rigidity κ of bilayer membranes was studied with coarse grained soft repulsive potentials using dissipative particle dynamics (DPD) simulations. Using a modified Andersen barostat to maintain the bilayers in a tensionless state, the bending rigidity was obtained from a Fourier analysis of the height fluctuations. From simulations carried out over a wide range of membrane thickness, the continuum scaling relation κ ∝ d2 was captured for both the Lα and Lβ phases. For membranes with 4 to 6 tail beads, the bending rigidity in the Lβ phase was found to be 10–15 times higher than that observed for the Lα phase. From the quadratic scalings obtained, a six fold increase in the area stretch modulus, kA was observed across the transition. The magnitude of increase in both κ and kA from the Lα to the Lβ phase is consistent with current experimental observations in lipid bilayers and to our knowledge provides for the first time a direct evaluation of the mechanical properties in the Lβ phase
Item Type: | Article |
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Source: | Copyright of this article belongs to Royal Society of Chemistry. |
ID Code: | 113203 |
Deposited On: | 22 May 2018 11:58 |
Last Modified: | 22 May 2018 11:58 |
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