Crossover of two power laws in the anomalous diffusion of a two lipid membrane

被引：25
|
作者：
Bakalis, Evangelos [1 ]
Hoefinger, Siegfried [1 ]
Venturini, Alessandro [2 ]
Zerbetto, Francesco [1 ]
机构：
[1] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
[2] Natl Res Council Italy, Inst Organ Synth & Photoreact, I-40129 Bologna, Italy
来源：
JOURNAL OF CHEMICAL PHYSICS | 2015年 / 142卷 / 21期
关键词：
PARTICLE MESH EWALD; LATERAL DIFFUSION; LANGEVIN EQUATION; RANDOM-WALKS; DYNAMICS; MODELS; BILAYERS; SYSTEMS; CELL;
D O I：
10.1063/1.4921891
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Molecular dynamics simulations of a bi-layer membrane made by the same number of 1-palmitoyl-2-oleoyl-glycero-3-phospho-ethanolamine and palmitoyl-oleoyl phosphatidylserine lipids reveal subdiffusional motion, which presents a crossover between two different power laws. Fractional Brownian motion is the stochastic mechanism that governs the motion in both regimes. The location of the crossover point is justified with simple geometrical arguments and is due to the activation of the mechanism of circumrotation of lipids about each other. (C) 2015 AIP Publishing LLC.
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页数：6
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