淡江大學機構典藏:Item 987654321/76822
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    题名: Ion Concentration Polarization in Polyelectrolyte-Modified Nanopores
    作者: Yeh, Li-Hsien;Zhang, Mingkan;Qian, Shizhi;Hsu, Jyh-Ping;Tseng, Shiojenn
    贡献者: 淡江大學數學學系
    关键词: Biomacromolecules;Brinkman equation;Continuum-based models;Counterions;Functionalized;Hydrodynamic field;Ion concentrations;Ion transports;Ionic current;Poisson-Nernst-Planck equations;Salt concentration;Solid-state nanopore;Polarization;Polyelectrolytes;Nanopores
    日期: 2012-04
    上传时间: 2013-06-13 11:25:56 (UTC+8)
    出版者: Washington, DC: American Chemical Society
    摘要: Nanopores functionalized with synthetic or biological
    polyelectrolyte (PE) brushes have significant potentials to rectify
    ionic current and probe single biomacromolecules. In this work,
    electric-field-induced ion transport and the resulting conductance in
    a PE-modified nanopore are theoretically studied using a
    continuum-based model, composed of coupled Poisson−Nernst−
    Planck (PNP) equations for the ionic mass transport, and Stokes
    and Brinkman equations for the hydrodynamic fields in the exterior
    and interior of the PE layer, respectively. Because of the competition
    between the transport of counterions and co-ions in the nanopore,
    two distinct types of ion concentration polarization (CP) occur at
    either opening of the PE-modified nanopore. These distinct CP
    behaviors, which significantly affect the nanopore conductance, can
    be easily manipulated by adjusting the bulk salt concentration and the imposed potential bias. The induced CP in the PEmodified nanopore is more appreciable than that in the corresponding bare solid-state nanopore.
    關聯: Journal of Physical Chemistry C 116(15), pp.8672-8677
    DOI: 10.1021/jp301957j
    显示于类别:[數學學系暨研究所] 期刊論文

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