盐浓度对聚电解质通过纳米孔电泳速度的影响
Effect of Salt Concentration on the Electrophoretic Speed of a Polyelectrolyte through a Nanopore
摘要：
在以前的论文[S。Ghosal，Phys.Rev.E74，041901（2006）]，在极小的德拜长度的极限下提出了一种用于确定通过轴对称缓慢变化的纳米孔的电泳速度的流体动力学模型。在这里的情况下，有限德拜层厚度被认为是限制孔的几何形状的圆柱体的长度远大于直径。此外，考虑了纳米孔壁上的均匀表面电荷的可能性。由此表明，计算的渡越时间与最近在硅纳米孔中的测量结果是一致的。
英文摘要：
In a previous paper [S. Ghosal, Phys. Rev. E 74, 041901 (2006)] a hydrodynamic model for determining the electrophoretic speed of a polyelectrolyte through an axially symmetric slowly varying nanopore was presented in the limit of a vanishingly small Debye length. Here the case of a finite Debye layer thickness is considered while restricting the pore geometry to that of a cylinder of length much larger than the diameter. Further, the possibility of a uniform surface charge on the walls of the nanopore is taken into account. It is thereby shown that the calculated transit times are consistent with recent measurements in silicon nanopores.
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