Journal
PHYSICAL REVIEW E
Volume 82, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.82.021922
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Funding
- University of Science and Technology of China through CAS
- National Natural Science Foundation of China [21074126]
- Deutsche Forschungsgemeinschaft (DFG)
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Using two-dimensional Langevin dynamics simulations, we investigate the dynamics of polymer translocation into a fluidic channel with diameter R through a nanopore under a driving force F. Due to the crowding effect induced by the partially translocated monomers, the translocation dynamics is significantly altered in comparison to an unconfined environment, namely, we observe a nonuniversal dependence of the translocation time tau on the chain length N. tau initially decreases rapidly and then saturates with increasing R, and a dependence of the scaling exponent alpha of tau with N on the channel width R is observed. The otherwise inverse linear scaling of tau with F breaks down and we observe a minimum of alpha as a function of F. These behaviors are interpreted in terms of the waiting time of an individual segment passing through the pore during translocation.
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