Fluctuating semiflexible polymer ribbon constrained to a ring

Fluctuating semiflexible polymer ribbon constrained to a ring
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约束在环上的波动半柔性聚合物带

DOI:
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发表时间:
2007
期刊:
The European Physical Journal E : Soft matter
影响因子:
--
通讯作者:
Erwin Frey
Erwin Frey
中科院分区:
--
文献类型:
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作者:
K. Alim;Erwin Frey

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聚合物或聚合物束的扭转刚度和非对称弯曲刚度由弹性带模型捕获。我们研究了环的几何形状引起的热波动带的影响,发现弯曲弯曲耦合除了扭曲弯曲耦合。此外,由于几何约束,聚合物的有效弯曲刚度增加。本文提出了一个用于高分子束实验研究的新参数:带状环的均方直径,它是在半柔性极限下解析确定的。蒙特卡洛模拟证实了模型的预测,以高的灵活性。
Abstract.Twist stiffness and an asymmetric bending stiffness of a polymer or a polymer bundle is captured by the elastic ribbon model. We investigate the effects a ring geometry induces to a thermally fluctuating ribbon, finding bend-bend coupling in addition to twist-bend coupling. Furthermore, due to the geometric constraint the polymer's effective bending stiffness increases. A new parameter for experimental investigations of polymer bundles is proposed: the mean square diameter of a ribbonlike ring, which is determined analytically in the semiflexible limit. Monte Carlo simulations are performed which affirm the model's prediction up to high flexibility.
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