Dynamic Properties of an Extended Polymer in Solution
Dynamic Properties of an Extended Polymer in Solution
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DOI：
10.1103/physrevlett.82.3548
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发表时间：
1999-04
影响因子：
8.6
通讯作者：
J. Hatfield;S. Quake
中科院分区：
文献类型：
--
作者：
J. Hatfield;S. Quake
延伸聚合物在各种情况下都是相关的，从经典的线圈拉伸问题到最近的单分子聚合物与DNA的实验。我们目前的理论计算和计算机模拟的动态性能的扩展的单一聚合物。我们讨论了张力和流体力学对聚合物基本弛豫时间τ的影响，发现张力支配着τ的行为。此外，通过延伸聚合物引起的对称性破缺“分裂”τ，导致不同的纵向和横向弛豫时间。我们的结果与最近的实验是一致的，我们讨论了线圈拉伸过渡的影响。
Extended polymers are relevant in a variety of situations ranging from the classic coil-stretch problem to recent single molecule polymer experiments with DNA. We present theoretical calculations and computer simulations of the dynamic properties of extended single polymers. We discuss the effects of tension and hydrodynamics on τ, the fundamental relaxation time of the polymer, and find that tension dominates the behavior of τ. Furthermore, the symmetry breaking caused by extending the polymer “splits” τ, leading to distinct longitudinal and transverse relaxation times. Our results are in agreement with recent experiments, and we discuss implications for the coil-stretch transition.