Polarization Effect of a Dielectric Membrane on the Ionic Current Rectification in a Conical Nanopore

Title
Polarization Effect of a Dielectric Membrane on the Ionic Current Rectification in a Conical Nanopore
Author(s)
주상우Zhang[Zhang]Ai[Ai]Liu[Liu]스즈첸
Keywords
ELECTROCHEMICAL TRANSPORT-PROPERTIES; TUNABLE NANOFLUIDIC DIODE; CONE-SHAPED NANOPORE; SURFACE-CHARGE; SPHERICAL-PARTICLE; ELECTROPHORETIC MOTION; ASYMMETRIC NANOPORES; CALBINDIN D-9K; NANOTUBE; CHANNEL
Issue Date
201112
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.115, no.50, pp.24951 - 24959
Abstract
Ionic current rectification (ICR) refers to a phenomenon that an ionic current flowing through a nanopore exhibits a preferential direction. In this paper, we investigate the ICR phenomenon in a conical nanopore embedded within a dielectric membrane using a continuum-based model, which is composed of the Nernst-Planck (NP) equations for the ionic mass transport, the Poisson equation for the electrostatics, and the Navier-Stokes (NS) equations for the flow field. Different from the existing studies, the emphasis of this investigation is placed on the polarization effect of the dielectric membrane on the ionic current and ICR in a conical nanopore. The results show that the polarization effect can influence the ion current and ICR, especially under the conditions of a relatively low kappa R(v) which is the ratio of the nanopore tip radius and the Debye length, and a relatively low surface charge density of the nanopore.
URI
http://hdl.handle.net/YU.REPOSITORY/24176http://dx.doi.org/10.1021/jp2089388
ISSN
1932-7447
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공과대학 > 기계공학부 > Articles
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