论文标题
驱动的密闭聚电解质溶液的动力学
Dynamics of a driven confined polyelectrolyte solution
论文作者
论文摘要
由电荷表面限制并由恒定电场驱动的聚电解质的运输在根据大小的DNA分离研究中感兴趣。使用包括表面极化效应的分子动力学模拟，我们发现聚电解质及其反处的迁移率随限制表面电荷密度而非单调的变化。对于限制电荷密度的最佳值，由于在多电解质链上赋予相对充满电的限制的差异摩擦，可以在多种聚电解质电荷的范围内实现聚电解质的有效分离。此外，通过改变带电的限制柜台的放置，可以通过利用介质内部和外部之间的介电不匹配引起的表面极化效应来实现增强的聚电解质分离。
The transport of polyelectrolytes confined by oppositely charged surfaces and driven by a constant electric field is of interest in studies of DNA separation according to size. Using molecular dynamics simulations that include surface polarization effect, we find that the mobilities of the polyelectrolytes and their counterions change non-monotonically with the confinement surface charge density. For an optimum value of the confinement charge density, efficient separation of polyelectrolytes can be achieved over a wide range of polyelectrolyte charge due to the differential friction imparted by the oppositely charged confinement on the polyelectrolyte chains. Furthermore, by altering the placement of the charged confinement counterions, enhanced polyelectrolyte separation can be achieved by utilizing surface polarization effect due to dielectric mismatch between the media inside and outside the confinement.
