Bakalis, Evangelos; Hoefinger, Siegfried; Venturini, Alessandro; Zerbetto, Francesco
Crossover of two power laws in the anomalous diffusion of a two lipid membrane
JOURNAL OF CHEMICAL PHYSICS, 142 Art. No. 215102, JUN 7 2015

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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