Semiflexible polymers confined in soft tubes

被引：78

作者：

Brochard-Wyart, F ^{[1
]}

Tanaka, T ^{[1
]}

Borghi, N ^{[1
]}

de Gennes, PG ^{[1
]}

机构：

[1] Inst Curie, Lab PCC, CNRS, UMR 168, F-75005 Paris, France

来源：

LANGMUIR | 2005年 / 21卷 / 09期

关键词：

D O I：

10.1021/la0474114

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We discuss various conformations for a polymer (of persistent length l(p)) confined into a deformable tube (the wall being a lipid bilayer with a certain surface tension sigma and curvature energy K). Our study assumes that there is no adsorption of the chain on the wall. Three states are compared: (a) an unperturbed tube, plus a confined chain, (b) a tube swollen in all the region surrounding the chain (similar to a snake eating a sausage), (c) a globule, a roughly spherical coil surrounded by a strongly deformed tube. We construct a (qualitative) phase diagram for these systems with two variables: the surface tension sigma and the degree of polymerization N. Our main conclusion is that "globules" usually win over "snakes".

引用

页码：4144 / 4148

页数：5

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