波纹状纳米通道中的生物聚合物过滤
Biopolymer filtration in corrugated nanochannels
摘要：
我们研究压力驱动的非平衡运输的线性，圆形和星形聚合物通过一个纳米通道包含一个矩形坑与充分的流体动力学相互作用和热波动。我们证明，与足够小的压力差，有轮廓长度依赖熵捕获的聚合物在坑坑时，坑和聚合物的大小是兼容的。这是由于流动和链松弛之间的竞争，在坑中，这导致了一个非单调的依赖性的聚合物的流动性对它的大小，并应有助于在纳米过滤装置的设计的基础上的聚合物的大小和形状。
英文摘要：
We examine pressure-driven non-equilibrium transport of linear, circular and star polymers through a nanochannel containing a rectangular pit with full hydrodynamic interactions and thermal fluctuations. We demonstrate that with sufficiently small pressure differences, there is contour length-dependent entropic trapping of the polymer in the pit when the pit and the polymer sizes are compatible. This is due to competition between flow and chain relaxation in the pit, which leads to a non-monotonic dependence of the polymer mobility on its size and should aid in the design of nanofiltration devices based on the polymer size and shape.
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