1. Department of Physics, Zhejiang University, Hangzhou 310027, China 2. College of Science, Qinzhou University, Qinzhou 535011, China 3. Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China
The translocation time of a polymer chain through an interaction energy gradient nanopore was studied by Monte Carlo simulations and the Fokker–Planck equation with double-absorbing boundary conditions. Both the simulation and calculation revealed three different behaviors for polymer translocation. These behaviors can be explained qualitatively from free-energy landscapes obtained for polymer translocation at different parameters. Results show that the translocation time of a polymer chain through a nanopore can be tuned by suitably designing the interaction energy gradient.
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