Diffusion in curved fluid membranes
Diffusion in curved fluid membranes
复制标题
DOI：
10.1103/physreve.73.041918
复制
发表时间：
2006-04-01
影响因子：
2.4
通讯作者：
Gov, NS
中科院分区：
文献类型：
--
作者：
Gov, NS
我们从理论上分析了曲率对流体膜中扩散的影响，在Saffman-Delbruck流体动力学模型。我们计算的影响，曲率的内在流动性的膜通过其厚度的变化，无论是静态或波动的曲率。我们治疗两个热曲率波动，和波动由于活跃的过程。这种曲率波动增加了平均膜厚度并减小了投影面积，从而降低了扩散系数。这种计算使我们能够预测剪切流对膜扩散的影响，并与活细胞上的观察结果进行比较。
We analyze theoretically the effects of curvature on the diffusion in a fluid membrane, within the Saffman-Delbruck hydrodynamic model. We calculate the effect of curvature on the intrinsic fluidity of a membrane through changes in its thickness, for both static or fluctuating curvature. We treat both thermal curvature fluctuations, and fluctuations due to active processes. Such curvature fluctuations increase the average membrane thickness and diminish the projected area, thereby decreasing the diffusion coefficient. This calculation allows us to predict the effect of shear flow on the membrane diffusion, and to compare to observations on living cells.