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arXiv 1610.01992cond-mat.softcond-mat.stat-mech
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栓系膜由于结构的不对称性而不能保持平坦

Tethered membranes do not remain flat for strong structural asymmetry

Tirthankar Banerjee, Niladri Sarkar, Abhik Basu

摘要:

我们建立了一个几乎平坦的、热平衡的流体膜的统计力学,该流体膜通过其一侧连接到弹性网络。我们预测,由此产生的结构(反转)的膜的不对称性,特别是由于弹性网络连接到其一侧,可以产生一个局部自发曲率$C_0$,这反过来可能会破坏原本平坦的膜。当$C_0$在固定温度下升高到阈值以上时,处于热力学极限的平坦栓系膜在结构上变得不稳定,发出平坦膜的{ \em起皱}的信号。在体外实验后的红细胞膜的三磷酸腺苷分子和血影蛋白丝脂双层的人工沉积耗尽,可用于验证我们的结果。

英文摘要:

We set up the statistical mechanics for a nearly flat, thermally equilibrated fluid membrane, attached to an elastic network through one of its sides. We predict that the resulting structural (inversion) asymmetry of the membrane, notably due to the elastic network attached to one of its sides, can generate a local spontaneous curvature $C_0$, that may in turn destabilize the otherwise flat membrane. As $C_0$ rises above a threshold at a fixed temperature, a flat tethered membrane in the thermodynamic limit becomes structurally unstable, signaling {\em crumpling} of the flat membrane. In-vitro experiments on red blood cell membranes after depletion of adenosine-tri-phosphate molecules and artificial deposition of spectrin filaments on lipid bilayers may be used to verify our results.

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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