Phys. Rev. Lett. 106, 158102 (2011) [4 pages]Long-Range Hydration Effect of Lipid Membrane Studied by Terahertz Time-Domain SpectroscopyReceived 14 July 2010; revised 11 March 2011; published 13 April 2011 The hydration state of biomolecules is believed to affect their self-assembly. The hydration state of phospholipid bilayers is studied precisely by terahertz spectroscopy, by which water perturbed by a lipid membrane is detected sensitively from the observation of the relaxation dynamics of water molecules in the subpicosecond time scale. Combined with x-ray observation of the lamellar structure of the lipid, a long-range hydration effect on up to 4–5 layers of water is confirmed. Most water molecules in the lamellae fall into the hydration water, and condensation of them is also indicated. © 2011 American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.106.158102
DOI:
10.1103/PhysRevLett.106.158102
PACS:
87.50.U-, 77.22.-d, 79.60.Dp, 82.70.Uv
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