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Article Dans Une Revue Scientific Highlight Année : 2004

Probing Dynamics at Interfaces: Molecular Motions in Lipid Bilayers studied by Neutron Backscattering

Tilo Seydel
Tim Salditt
  • Fonction : Auteur

Résumé

Lipid membranes in a physiological context cannot be understood without taking into account their mobile environment. Here, we report on 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). This technique allows discriminating the Q-dependent onset of mobility and provides a benchmark test regarding the feasibility of dynamical neutron scattering investigations on these sample systems. Apart from freezing of the lipid acyl-chains, we could observe a second freezing temperature that we attribute to the hydration water in between the membrane stacks. The freezing is lowered several degrees as compared to (heavy) bulk water.

Dates et versions

hal-00122957 , version 1 (06-01-2007)

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Maikel C. Rheinstädter, Tilo Seydel, Tim Salditt. Probing Dynamics at Interfaces: Molecular Motions in Lipid Bilayers studied by Neutron Backscattering. Scientific Highlight, 2004, pp.68. ⟨hal-00122957⟩
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