Polyelectrolyte Threading through a Nanopore.

ABSTRACT: Threading charged polymers through a nanopore, driven by electric fields E, is investigated by means of Langevin dynamics simulations. The mean translocation time 〈 τ 〉 is shown to follow a scaling law N^α, and the exponent α increases monotonically from 1.16 (4) to 1.40 (3) with E. The result is double-checked by the calculation of mean square displacement of translocation coordinate, which asserts a scaling behavior t^β (for t near τ) with β complying with the relation αβ = 2. At a fixed chain length N, 〈τ〉 displayed a reciprocal scaling behavior E^-1 in the weak and also in the strong fields, connected by a transition E^-1.64(5) in the intermediate fields. The variations of the radius of gyration of chain and the positions of chain end are monitor

SUBMITTER: Hsiao PY 

PROVIDER: S-EPMC6432567 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature