平面磷脂膜在非弹性光散射中的次赫兹响应

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY JETP Letters Pub Date : 2024-11-01 DOI:10.1134/S0021364024602756
S. V. Adichtchev, E. A. Dobrynina, N. V. Surovtsev
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引用次数: 0

摘要

利用低频拉曼散射方法,研究了室温下磷脂双分子层的水合平面样品。结果表明,在亚赫兹范围内存在一种弛豫响应,其光谱形状与皮秒范围内弛豫时间的广泛分布相对应。弛豫响应的光谱易感性由一个指数为 0.25 的幂函数描述,对磷脂双层的凝胶相和流体相都是一样的,并且与不同磷脂的碳氢化合物尾部的饱和程度无关。亚赫兹弛豫响应可视为基本弛豫事件,它先于横向扩散和磷脂双分子层厚度或曲率变化等较慢的弛豫过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Subterahertz Response of Planar Phospholipid Membranes in Inelastic Light Scattering

Using a method of low frequency Raman scattering, hydrated planar samples of phospholipid bilayers are studied at room temperature. It has been demonstrated that a relaxation response, the spectral shape of which corresponds to a wide distribution of relaxation times in the picosecond range, is manifested in the subterahertz range. The spectral susceptibility of the relaxation response is described by a power function with an exponent of 0.25, is the same for gel and fluid phases of phospholipid bilayers, and does not depend on the degree of saturation of hydrocarbon tails of different phospholipids. The subterahertz relaxation response can be considered as an elementary relaxation event, which precedes slower relaxation processes such as lateral diffusion and changes in the thickness or curvature of a phospholipid bilayer.

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来源期刊
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
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