Ethanol enhances collective dynamics of lipid membranes
Ethanol enhances collective dynamics of lipid membranes
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DOI：
10.1103/physreve.83.050907
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发表时间：
2011-05-25
影响因子：
2.4
通讯作者：
Rheinstaedter, Maikel C.
中科院分区：
文献类型：
--
作者：
Kaye, Martin D.;Schmalzl, Karin;Rheinstaedter, Maikel C.
从非弹性中子散射实验和全原子分子动力学模拟，我们提出了一个低能量动力学模式的证据，在流体相的1，2-dimyristoyl-sn-glycero-3-phoshatidylcholine（DMPC）双层浸没在5%的水/乙醇溶液。除了众所周知的声子，显示出液体般的色散与能量高达4.5毫电子伏，我们观察到一个额外的模式在较小的能量为0.8毫电子伏，这表明很少或没有色散。这两种模式显示横向特性，并可能与分子运动垂直的双层。
From inelastic neutron-scattering experiments and all atom molecular dynamics simulations we present evidence for a low-energy dynamical mode in the fluid phase of a 1,2-dimyristoyl-sn-glycero-3-phoshatidylcholine (DMPC) bilayer immersed in a 5% water/ethanol solution. In addition to the well-known phonon that shows a liquidlike dispersion with energies up to 4.5 meV, we observe an additional mode at smaller energies of 0.8 meV, which shows little or no dispersion. Both modes show transverse properties and might be related to molecular motion perpendicular to the bilayer.