Surface tension and Laplace pressure in triangulated surface models for membranes without fixed boundary

Surface tension and Laplace pressure in triangulated surface models for membranes without fixed boundary
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无固定边界膜三角表面模型中的表面张力和拉普拉斯压力

DOI:
10.1007/s10910-015-0564-9
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发表时间:
2016
影响因子:
1.7
通讯作者:
A.Shobukhov and H.Sekino
A.Shobukhov and H.Sekino
中科院分区:
化学3区
文献类型:
--
作者:
H.Koibuchi;A.Shobukhov and H.Sekino

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用Monte Carlo(MC)方法研究了作为脂质层模型的球形膜的表面张力。我们使用自避免三角网格上定义的正则表面模型。表面张力是通过在MC模拟过程中保持总表面积A恒定来计算的。在的计算中,我们使用A代替投影面积,由于无边界球面的波动,投影面积是未知的。在保持封闭体积不变的情况下,还计算了表面内外侧的压力差。利用拉普拉斯公式,求出与框架张力共轭的张力,并检验与是否一致。我们发现在足够大的弯曲刚度或足够大的A/N范围内,和之间是合理的一致性。同时还发现,在栓系和流体表面,在极限范围内都是常数。
A Monte Carlo (MC) study is performed to evaluate the surface tensionof spherical membranes that may be regarded as the models of the lipid layers. We use the canonical surface model defined on the self-avoiding triangulated lattices. The surface tensionis calculated by keeping the total surface areaAconstant during the MC simulations. In the evaluation of, we useAinstead of the projected area, which is unknown due to the fluctuation of the spherical surface without boundary. The pressure differencebetween the inner and the outer sides of the surface is also calculated by maintaining the enclosed volume constant. Usingand the Laplace formula, we obtain the tension, which is considered to be equal to the frame tensionconjugate to, and check whether or notis consistent with. We find reasonable consistency betweenandin the region of sufficiently large bending rigidityor sufficiently largeA/N. It is also found thatbecomes constant in the limit ofboth in the tethered and fluid surfaces.
DOI: 10.1016/0550-3213(87)90280-x
发表时间: 1987
期刊: Nuclear Physics
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