Free energy of a long semiflexible polymer confined in a spherical cavity

被引：36
作者：
Gao, Jie [1 ]
Tang, Ping [1 ]
Yang, Yuliang [1 ]
Chen, Jeff Z. Y. [2 ]
机构：
[1] Fudan Univ, Dep Macromol Sci, Shanghai 200433, Peoples R China
[2] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada
来源：
SOFT MATTER | 2014年 / 10卷 / 26期
关键词：
DYNAMICS; DNA; SIMULATION; TRANSITIONS; STATISTICS; EXTENSION; ORDER; MODEL; TUBE;
D O I：
10.1039/c4sm00605d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：4674 / 4685
页数：12
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