Tube Concept for Entangled Stiff Fibers Predicts Their Dynamics in Space and Time.
Tube Concept for Entangled Stiff Fibers Predicts Their Dynamics in Space and Time.
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缠结硬纤维的管概念预测了它们在空间和时间上的动力学
DOI：
10.1103/physrevlett.117.097801
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发表时间：
2016
影响因子：
8.6
通讯作者：
T. Franosch
中科院分区：
文献类型：
--
作者：
S. Leitmann;F. Höfling;T. Franosch
我们研究了硬质纤维在半稀释区深处的动态拥挤溶液，在这种情况下，单个组分的运动变得越来越受限于一个狭窄的管子。在布朗动力学模拟中，通过采用几何适应的近邻列表，可以使用波数来解析封闭管中的运动的时空动力学。我们证明，在这种拥挤的环境中，描述空间和时间运动的中间散射函数可以通过模拟单个自由扩散的幻象针来定量地预测，但具有非常不寻常的扩散系数。
We study dynamically crowded solutions of stiff fibers deep in the semidilute regime, where the motion of a single constituent becomes increasingly confined to a narrow tube. The spatiotemporal dynamics for wave numbers resolving the motion in the confining tube becomes accessible in Brownian dynamics simulations upon employing a geometry-adapted neighbor list. We demonstrate that in such crowded environments the intermediate scattering function, characterizing the motion in space and time, can be predicted quantitatively by simulating a single freely diffusing phantom needle only, yet with very unusual diffusion coefficients.