Stiffness and conformations of molecular bottle-brushes strongly adsorbed on a flat surface

被引：0
|
作者：
I.I. Potemkin
A.R. Khokhlov
P. Reineker
机构：
[1] Physics Department,
[2] Moscow State University,undefined
[3] Moscow,undefined
[4] 117234 Russia,undefined
[5] Department of Theoretical Physics,undefined
[6] University of Ulm,undefined
[7] 89069 Ulm,undefined
[8] Germany,undefined
来源：
The European Physical Journal E | 2001年 / 4卷
关键词：
Computer Simulation; Conformational Change; Flat Surface; Symmetrical Distribution; Persistence Length;
D O I：
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中图分类号：
学科分类号：
摘要：
A theory of the conformational behavior and analysis of the persistence length of molecular bottle-brushes strongly adsorbed on a flat surface in a good solvent is presented. For long enough side chains we have shown that the adsorption of a small fraction of side chains already leads to significant increase of the stiffness and drastic conformational changes of the brush in comparison with the 3D case. For a symmetrical distribution of the adsorbed side chains with respect to the backbone, the equilibrium conformation of the brush is close to a rod-like one due to the very large stiffness of the molecule. Under certain conditions the excluded-volume interactions of the side chains of an asymmetrical brush can lead to its bending or twisting in spiral. The obtained results are in good agreement with computer simulations.
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页码：93 / 101
页数：8
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