Dynamics of self-threading ring polymers in a gel.

Dynamics of self-threading ring polymers in a gel.
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凝胶中自螺纹环聚合物的动力学。

DOI:
10.1039/c4sm00619d
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发表时间:
2014
期刊:
影响因子:
3.4
通讯作者:
Michieletto D
Michieletto D
中科院分区:
化学2区
文献类型:
--
作者:
Michieletto D

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我们研究了环状聚合物在低浓度背景凝胶中扩散的动力学。我们这样做是为了探索环形聚合物中拓扑和动力学之间的相互作用。我们开发了一种算法,考虑到环通过自身穿过阻碍自身运动的可能性,即“自穿线”。我们的结果表明,自螺纹的数量与环的长度有很大的关系,这与模型的细节基本无关。人们发现,土星环动力学的减缓与能够促进运动的部分有关。我们的研究结果为环状聚合物在凝胶中的运动提供了一个新的视角,这一理论仍然缺乏,并可能有助于我们理解凝胶电泳实验中环状聚合物的不可逆捕获。
We study the dynamics of ring polymers confined to diffuse in a background gel at low concentrations. We do this in order to probe the inter-play between topology and dynamics in ring polymers. We develop an algorithm that takes into account the possibility that the rings hinder their own motion by passing through themselves, i.e. “self-threading”. Our results suggest that the number of self-threadings scales extensively with the length of the rings and that this is substantially independent of the details of the model. The slowing down of the rings' dynamics is found to be related to the fraction of segments that can contribute to the motion. Our results give a novel perspective on the motion of ring polymers in a gel, for which a complete theory is still lacking, and may help us to understand the irreversible trapping of ring polymers in gel electrophoresis experiments.
DOI: 10.1021/mz500060c
发表时间: 2014-03-01
期刊: ACS MACRO LETTERS
影响因子: 7.015
作者:
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通讯作者: Turner, Matthew S.
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发表时间: 1988
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DOI: 10.1016/s0006-3495(98)78020-8
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