Free energy of a long semiflexible polymer confined in a spherical cavity.
Free energy of a long semiflexible polymer confined in a spherical cavity.
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DOI：
10.1039/c4sm00605d
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发表时间：
2014-06
期刊：
影响因子：
3.4
通讯作者：
Jie Gao;P. Tang;Yuliang Yang;Jeff Z. Y. Chen
中科院分区：
文献类型：
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作者：
Jie Gao;P. Tang;Yuliang Yang;Jeff Z. Y. Chen
研究了受限于球面内的蠕虫链的自由能和构象性质。我们表明，在弱限制的限制，蠕虫状链模型准确地再现了高斯链的限制属性;在这种情况下，限制熵占主导地位的自由能;在强限制的限制，自由能占主导地位的链的弯曲能，这是被迫缠绕在限制表面。我们还提出了一个数值解的两个限制之间的交叉区域内，求解微分方程的概率分布函数满足。
The free energy and conformational properties of a wormlike chain confined inside a spherical surface are investigated. We show that in the weak-confinement limit, the wormlike chain model exactly reproduces the confinement properties of a Gaussian chain; in such a case the confinement entropy dominates the free energy; in the strong-confinement limit, the free energy is dominated by the bending energy of the chain, which is forced to wrap around the confining surface. We also present a numerical solution within the crossover region between the two limits, solving the differential equation that the probability distribution function satisfies.