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Title: Ethanol enhances collective dynamics of lipid membranes

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.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)
  2. Juelich Centre for Neutron Science, Forschungszentrum Juelich, Outstation at ILL, F-38042 Grenoble Cedex 9 (France)
  3. Dipartimento di Fisica, Universita degli Studi di Messina, I-98100 Messina (Italy)
  4. UMR 7565, Structure et Reactivite des Systemes Moleculaires Complexes, CNRS-Nancy University, F-54506 Vandoeuvre les Nancy (France)
  5. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 Canada (Canada)
Publication Date:
OSTI Identifier:
21560281
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevE.83.050907; (c) 2011 American Institute of Physics; Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 74 ATOMIC AND MOLECULAR PHYSICS; AQUEOUS SOLUTIONS; ATOMS; ETHANOL; FLUIDS; INELASTIC SCATTERING; LAYERS; MEMBRANES; MEV RANGE; MOLECULAR DYNAMICS METHOD; NEUTRON DIFFRACTION; PHONONS; PHOSPHOLIPIDS; ALCOHOLS; CALCULATION METHODS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; ENERGY RANGE; ESTERS; HOMOGENEOUS MIXTURES; HYDROXY COMPOUNDS; LIPIDS; MIXTURES; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; QUASI PARTICLES; SCATTERING; SOLUTIONS

Citation Formats

Kaye, Martin D, Schmalzl, Karin, Conti Nibali, Valeria, Tarek, Mounir, Rheinstaedter, Maikel C, and Canadian Neutron Beam Centre, National Research Council Canada, Chalk River, Ontario, K0J 1J0. Ethanol enhances collective dynamics of lipid membranes. United States: N. p., 2011. Web. doi:10.1103/PHYSREVE.83.050907.
Kaye, Martin D, Schmalzl, Karin, Conti Nibali, Valeria, Tarek, Mounir, Rheinstaedter, Maikel C, & Canadian Neutron Beam Centre, National Research Council Canada, Chalk River, Ontario, K0J 1J0. Ethanol enhances collective dynamics of lipid membranes. United States. https://doi.org/10.1103/PHYSREVE.83.050907
Kaye, Martin D, Schmalzl, Karin, Conti Nibali, Valeria, Tarek, Mounir, Rheinstaedter, Maikel C, and Canadian Neutron Beam Centre, National Research Council Canada, Chalk River, Ontario, K0J 1J0. 2011. "Ethanol enhances collective dynamics of lipid membranes". United States. https://doi.org/10.1103/PHYSREVE.83.050907.
@article{osti_21560281,
title = {Ethanol enhances collective dynamics of lipid membranes},
author = {Kaye, Martin D and Schmalzl, Karin and Conti Nibali, Valeria and Tarek, Mounir and Rheinstaedter, Maikel C and Canadian Neutron Beam Centre, National Research Council Canada, Chalk River, Ontario, K0J 1J0},
abstractNote = {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.},
doi = {10.1103/PHYSREVE.83.050907},
url = {https://www.osti.gov/biblio/21560281}, journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)},
issn = {1539-3755},
number = 5,
volume = 83,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2011},
month = {Sun May 15 00:00:00 EDT 2011}
}