| Issue |
Europhys. Lett.
Volume 69, Number 4, February 2005
|
|
|---|---|---|
| Page(s) | 650 - 656 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2004-10382-3 | |
| Published online | 19 January 2005 | |
Shape fluctuations and elastic properties of two-component bilayer membranes
Max-Planck-Institut für Kolloid- und Grenzflächenforschung 14424 Potsdam, Germany
Received:
28
July
2004
Accepted:
7
December
2004
The elastic properties of two-component bilayer membranes are
studied using a coarse-grain model for amphiphilic molecules. The
two species of amphiphiles considered here differ only in their
length. Molecular-dynamics simulations are performed in order to
analyze the shape fluctuations of the two-component bilayer
membranes and to determine their bending rigidity. Both the
bending rigidity and its inverse are found to be nonmonotonic
functions of the mole fraction 
of the shorter
B-amphiphiles and, thus, do not satisfy a simple lever rule. The
intrinsic area of the bilayer also exhibits a nonmonotonic
dependence on and a maximum close to 
.
PACS: 87.16.Dg – Membranes, bilayers, and vesicles / 82.70.-y – Disperse systems; complex fluids / 61.20.Ja – Computer simulation of liquid structure
© EDP Sciences, 2005
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