Collaborative effects in polymer translocation and the appearance of fictitious free-energy barriers

Damien P. Foster, F. Piguet

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    Abstract

    The translocation time of a polymer through a pore under the influence of an external field depends on a number of parameters, the most important of which are the field strength, the interactionwith the pore, and the confinement entropy. Experimentally, the translocation is dominated either by the driving force (electrophoretic regime) or by the entropy of confinement or pore interaction (barrier dominated regime). In this Rapid Communication we study a simple model for polymer translocation, loosely based on the asymmetric exclusion process, which shows that it is possible to have what experimentally would be interpreted as barrier dominated, even where there is no barrier to translocation. This effective barrier is interpreted as being due to collaborative effects between the monomers forming the polymer chain.
    Original languageEnglish
    Article number30601
    JournalPhysical review E: Statistical, Nonlinear, and Soft Matter Physics
    Volume89
    Issue number3
    DOIs
    Publication statusPublished - 28 Mar 2014

    Fingerprint

    Translocation
    Free Energy
    Polymers
    free energy
    polymers
    porosity
    Asymmetric Exclusion Process
    Driving Force
    exclusion
    External Field
    field strength
    communication
    Entropy
    entropy
    Interaction
    interactions
    Model

    Bibliographical note

    This is an open access journal and the published PDF is free to view on the publisher American Physical Society's website at: http://dx.doi.org/10.1103/PhysRevE.89.030601
    ©2014 American Physical Society

    Cite this

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