Journal Article

PreJuSER-15571

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ethanol enhances collective dynamics of lipid membranes

Kaye, M. D. ; Schmalzl, K.FZJ* ; Conti Nibali, V. ; Tarek, M. ; Rheinstädter, M. C.

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/9300  doi:10.1103/PhysRevE.83.050907

Abstract: From inelastic neutron-scattering experiments and all atom molecular dynamics simulations we present evidence for a low-energy dynamical mode in the fluid phase of a 1,2-dimyristoyl-sn-glycero-3-phoshatidylcholine (DMPC) bilayer immersed in a 5% water/ethanol solution. In addition to the well-known phonon that shows a liquidlike dispersion with energies up to 4.5 meV, we observe an additional mode at smaller energies of 0.8 meV, which shows little or no dispersion. Both modes show transverse properties and might be related to molecular motion perpendicular to the bilayer.

Keyword(s): J

Note: We acknowledge financial support from the Natural Sciences and Engineering Research Council and National Research Council of Canada and thank the Institut Laue-Langevin for the allocation of beam time. V.C.-N. has carried out research under an HPC-EUROPA2 project (project number 228398). We are grateful to W. Treptow for help on the simulations of the initial ethanol water systems. Calculations were performed at the CINES supercomputer center (Montpellier, France).

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Contributing Institute(s):

1. Streumethoden (PGI-4)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
3. Streumethoden (JCNS-2)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)
3. HPC-EUROPA2 - Pan-European Research infrastructure on High Performance Computing for 21st century Science (228398) (228398)

Appears in the scientific report 2011

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