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Spectroscopy
Volume 24 (2010), Issue 5, Pages 461-466
http://dx.doi.org/10.3233/SPE-2010-0481

Elastic scattering studies of aligned DMPC multilayers on different hydrations 1

Marcus Trapp,1 Fanni Juranyi,2 Moeava Tehei,3,4 Lambert van Eijck,5 Bruno Demé,5 Thomas Gutberlet,6 and Judith Peters1,5,7,8

1Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, Grenoble, France
2LNS, ETH Zürich and Paul Scherrer Institut, Villigen, Switzerland
3Australian Institute of Nuclear Science and Engineering, Menai, Australia
4School of Chemistry and Centre for Medical Bioscience, University of Wollongong, Wollongong, Australia
5Institut Laue-Langevin, Grenoble, France
6JCNS at FRMII, Garching, Germany
7Université Joseph Fourier, Grenoble, France
8Université Joseph Fourier, F-38042 Grenoble CĂ©dex 9, France

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Biological membranes, consisting mainly of phospholipids and proteins, are organized in a bilayered structure which exhibits dynamical behaviour within time regimes ranging from 10–12 s with the motion of alkyl chain defects and 1 s corresponding to collective excitations of the bilayer [Europhysics Letters 8 (1989), 201–206]. With the prominent role hydration plays on the structural phase behaviour of phospholipids membranes, it is essential for a better description of membranes to understand also the influence of hydration on the dynamics of membrane systems. In the present study we have performed neutron scattering investigations on highly oriented DMPC-d54 multilayers at two different relative humidity (rh) levels. Our results reveal the strong influence of hydration on the local membrane dynamics, i.e., head group dynamics.