单链高分子通过薄膜上纳米孔隙的输运过程:链间相互作用的影响

Translocation of Single Polymer Chain Through Nanopore on a Membrane:The Effect of Interactions Between Polymer Chains

从理论上研究了高分子链通过位于薄膜上的一个纳米孔隙的输运问题.考虑在膜的一侧引入与传输高分子链有特殊相互作用的高分子链段,研究链间相互作用致使高分子链构型的改变对其平均首次通过时间的影响,进而在不同条件下进行了相应的数值模拟,并讨论了其它一些相关问题.

Based on the configuration changes induced by some special interactions between polymer chains, the translocation of a single polymer chain through nanopore on a membrane was investigated. The influence of the interactions between the introduced polymer chain and the transloeating one on the mean first-passage time （MFPT） was studied, and then the corresponding numerical simulations were presented under different conditions. It is shown that, the interactions between polymer chains have influence on the mean first-passage time （MFPT） and the translocating polymer chain can significantly decrease under certain conditions. Moreover, some relevant factors associated with the translocating process such as the effects of the values of chemical potential are also discussed.