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arXiv 1105.4898cond-mat.soft
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长尺度和时间尺度下多组分脂膜的动力学模拟

Dynamic simulations of multicomponent lipid membranes over long length and time scales

Brian A. Camley, Frank L. H. Brown

摘要:

我们提出了一个多组分脂质双层的随机相场模型,明确占准二维流体动力学环境独特的薄流体膜浸没在水溶液中。动态范围广泛的长度尺度(从纳米到微米)的持续时间长达数秒和更长的时间很容易访问,并提供了一个直接比较荧光显微镜测量三元脂质/胆固醇混合物。相分离动力学的模拟结果与实验结果一致,并阐明了流体力学在粗化过程中的重要性。

英文摘要:

We present a stochastic phase-field model for multicomponent lipid bilayers that explicitly accounts for the quasi-two-dimensional hydrodynamic environment unique to a thin fluid membrane immersed in aqueous solution. Dynamics over a wide range of length scales (from nanometers to microns) for durations up to seconds and longer are readily accessed and provide a direct comparison to fluorescence microscopy measurements in ternary lipid/cholesterol mixtures. Simulations of phase separation kinetics agree with experiment and elucidate the importance of hydrodynamics in the coarsening process.

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