Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 125, Issue 15, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2357943
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Molecular dynamics simulations of a model bilayer made of surfactant dimers in a Lennard-Jones solvent are reported for three sizes of the systems up to an area of 100 sigma x100 sigma and for a large interval of the specific areas: from hole formation under tension deep into the floppy state of a buckling compressed bilayer. The transition to the floppy state appears quite abrupt and discontinuous; in the floppy state the lateral tension is negative and scales with size while vanishing from below. The structure factor was also determined for all three sizes and all areas; for most part the apparent tension is larger than the lateral tension whereas the apparent rigidity constant-always positive-is low in the floppy state and increasing in the tensioned state. Both do not scale visibly with size. The replacement of the 1/q(2) capillary-wave divergence by another pole is accounted for and explained. (c) 2006 American Institute of Physics.
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