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首页> 外文期刊>The Journal of Chemical Physics >Polymer translocation through a long nanopore
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Polymer translocation through a long nanopore

机译：聚合物通过长纳米孔易位

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摘要

Polymer translocation through a nanopore in a membrane is investigated theoretically. Recent experiments on voltage-driven DNA and RNA translocations through a nanopore indicate that the size and geometry of the pore are important factors in polymer dynamics. A theoretical approach is presented which explicily takes into account the effect of the nanopore length and diameter for polymer motionacross the membrane. It is shown that the length of the pore is crucial for polymer translocation dynamics. The present model predicts that for realistic conditions there are two regimes of tanslocation depending on polymer size:for polymer chains larger than the pore length,the velocity of translocation is nealry constant,while for polymer chains smaller than the pore length the velocity increases with decreasing polymer size. These results agree with experimental data.
机译：理论上研究了聚合物通过膜中纳米孔的移位。电压驱动的DNA和RNA通过纳米孔易位的最新实验表明，孔的大小和几何形状是聚合物动力学的重要因素。提出了一种理论方法，该方法明确考虑了纳米孔长度和直径对于跨膜运动的聚合物的影响。结果表明，孔的长度对于聚合物移位动力学至关重要。本模型预测，在现实条件下，取决于聚合物的大小，有两种错位方式：对于大于孔长的聚合物链，其位错速度是恒定的;而对于小于孔长的聚合物链，其速度随其降低而增加聚合物尺寸。这些结果与实验数据一致。

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