Abstract
We investigate the influence of chain rigidity on the dynamics of polymer translocation in the presence of binding particles (BPs) through a nanopore using two-dimensional Langevin dynamics simulations. With increasing chain rigidity , the mean translocation time increases monotonically due to an increase in the radius of gyration and a decrease in the center of mass velocity. Particularly for weak binding, we further find that shows a power-law behavior with the persistence length . Analysis indicates a scaling relation between the average velocity of the center of mass of a chain and . As the chain becomes stiffer, the distribution of the translocation time approximates the Gaussian distribution and gets broader with the peak position being shifted towards longer translocation time. The corresponding translocation coordinate of the maximum waiting time gets smaller with increasing chain rigidity. Finally, under an extremely low BP concentration, shows a minimum for small , while it decreases monotonically for large with increasing binding energy. Our results suggest a nontrivial effect of the intrinsic property of chains on the dynamics of polymer translocation driven by BPs.
3 More- Received 9 April 2014
- Revised 14 August 2014
DOI:https://doi.org/10.1103/PhysRevE.90.042708
©2014 American Physical Society