Study of water diffusion on single-supported bilayer lipid membranes by quasielastic neutron scattering

被引：10

作者：

Bai, M. ^{[1
,2
]}

Miskowiec, A. ^{[1
,2
]}

Hansen, F. Y. ^{[1
,2
,6
]}

Taub, H. ^{[1
,2
]}

Jenkins, T. ^{[3
]}

Tyagi, M. ^{[3
,4
]}

Diallo, S. O. ^{[5
]}

Mamontov, E. ^{[5
]}

Herwig, K. W. ^{[5
]}

Wang, S. -K. ^{[1
,2
,7
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] Univ Missouri, Univ Missouri Res Reactor, Columbia, MO 65211 USA

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[5] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

[6] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

[7] Ctr Comprehens Canc, Palm Springs, CA 92263 USA

来源：

EPL | 2012年 / 98卷 / 04期

基金：

美国国家科学基金会;

关键词：

DEUTERON MAGNETIC-RESONANCE; MOLECULAR-DYNAMICS; HYDRATION; STATE;

D O I：

10.1209/0295-5075/98/48006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-energy-resolution quasielastic neutron scattering has been used to elucidate the diffusion of water molecules in proximity to single bilayer lipid membranes supported on a silicon substrate. By varying sample temperature, level of hydration, and deuteration, we identify three different types of diffusive water motion: bulk-like, confined, and bound. The motion of bulk-like and confined water molecules is fast compared to those bound to the lipid head groups (7-10 H2O molecules per lipid), which move on the same nanosecond time scale as H atoms within the lipid molecules. Copyright (C) EPLA, 2012

引用

页数：6

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