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arXiv 1602.07074cond-mat.soft
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柔性polymer被限制在锥形纳米通道内

Flexible polymer confined inside a cone-shaped nano-channel

Narges Nikoofard, Hossein Fazli

摘要:

在许多实验情况下,聚合物在锥形几何形状中的纳米尺度限制发生。本文采用分子动力学模拟方法对柔性聚合物在锥形纳米通道中的运动进行了理论研究。研究了通道内单体的分布、受限聚合物的构型、作用在聚合物上的熵力以及它们对通道和聚合物参数的依赖性。理论和仿真结果吻合得很好。在模拟中测量了由通道的不对称形状引起的聚合物上的熵力,并且发现其幅度相对于热能是显著的。所获得的力对通道参数的依赖性可能是有用的锥形纳米通道的设计。

英文摘要:

Nano-scale confinement of polymer in cone-shaped geometries occurs in many experimental situations. A flexible polymer confined in a cone-shaped nano-channel is studied theoretically and using molecular dynamics simulations. Distribution of the monomers inside the channel, configuration of the confined polymer, entropic force acting on the polymer, and their dependence on the channel and the polymer parameters are investigated. The theory and the simulation results are in very good agreement. The entropic force on the polymer that results from the asymmetric shape of the channel is measured in the simulations and its magnitude is found to be significant relative to thermal energy. The obtained dependence of the force on the channel parameters may be useful in the design of cone-shaped nano-channels.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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