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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2005

Molecular motions in lipid bilayers studied by the neutron backscattering technique

Tilo Seydel
Tim Salditt
  • Fonction : Auteur

Résumé

We report a high energy-resolution neutron backscattering study to investigate slow motions on nanosecond time scales in highly oriented solid supported phospholipid bilayers of the model system DMPC -d54 (deuterated 1,2-dimyristoyl-sn-glycero-3-phoshatidylcholine), hydrated with heavy water. This technique allows to discriminate the onset of mobility at different length scales for the different molecular components, as e.g.\@ the lipid acyl-chains and the hydration water in between the membrane stacks, respectively, and provides a benchmark test regarding the feasibility of neutron backscattering investigations on these sample systems. We discuss freezing of the lipid acyl-chains, as observed by this technique, and observe a second freezing transition which we attribute to the hydration water.

Dates et versions

hal-00122956 , version 1 (06-01-2007)

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Maikel C. Rheinstädter, Tilo Seydel, Franz Demmel, Tim Salditt. Molecular motions in lipid bilayers studied by the neutron backscattering technique. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2005, 71, pp.061908. ⟨10.1103/PhysRevE.71.061908⟩. ⟨hal-00122956⟩
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