期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3580769
关键词
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
For the translocation of a polymer through a nanopore, a quasistatic assumption for the dynamics yields a tractable form for the entropic barrier. Although this is a much simplified model, interesting features such as robust scaling emerge from its application. To explore these details, we present a method of mapping the translocation process as an incremental mean first passage problem. In this approach, the quantity of interest is the average first time t(0) at which the polymer achieves a displacement of Delta s in the translocation coordinate s. Constructing scenarios with different initial conditions and boundary conditions, analytic and exact numerical approaches are used to resolve the dynamics of translocation in detail and generate new insight into the nature of the entropic barrier. (C) 2011 American Institute of Physics. [doi:10.1063/1.3580769]
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