arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.02419cond-mat.softphysics.bio-ph
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具有自发曲率的流体膜的杯-泡转变

Cup-to-vesicle transition of a fluid membrane with spontaneous curvature

Hiroshi Noguchi

摘要:

没有自发曲率的流体膜从盘到囊泡的转变可以用边缘线能和曲率能之间的竞争来描述。然而,具有自发曲率的非对称膜的转变尚未被理解。在这项研究中,形状的流体膜补丁具有恒定的自发曲率和封闭过渡到一个囊泡的研究使用理论和无网格膜模拟。据证实,(Meta)稳定和瞬态膜是很好的近似球冠。膜高斯模量可以从膜补丁的杯形以及从转移概率来估计,尽管后一种估计给出了略小的负值。此外,膜的自组装动力学,其中较小的囊泡形成在较高的自发曲率,较高的边缘线张力,和较低的密度。

英文摘要:

The disk-to-vesicle transition of a fluid membrane with no spontaneous curvature is well described by the competition between edge line and curvature energies. However, the transition of asymmetric membranes with spontaneous curvatures is not yet understood. In this study, the shape of the fluid membrane patch with a constant spontaneous curvature and its closing transition to a vesicle is investigated using theory and meshless membrane simulations. It is confirmed that the (meta)stable and transient membranes are well approximated by spherical caps. The membrane Gaussian modulus can be estimated from the cup shape of membrane patches as well as from the transition probability, although the latter estimate gives slightly smaller negative values. Furthermore, the self-assembly dynamics of membranes are presented, in which smaller vesicles are formed at higher spontaneous curvatures, higher edge line tension, and lower density.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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