Modeling of Ion Diffusion Induced Current through a Nanochannel

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URI: http://hdl.handle.net/2042/6792
Title: Modeling of Ion Diffusion Induced Current through a Nanochannel
Author: Yang F.-C.; Wang, G.-J.; Chien, Ming-Chun
Abstract: Ion diffusion induced current, Nanochannel, Concentration gradientIn this article, a theoretical model that takes into consideration both the diffusion and electric osmosis fluxes to estimate the diffusion current through a nanochannel is proposed. Equivalent impedance of a nanochannel is modeled as a series connection of finite RC circuits. The impedances of the electrical double layer and buffer solution in each infinitesimal RC circuit are represented by a capacitor and a resister, respectively. Due to the electrical double layer effect, the diffusion induced current in the proposed model is position dependent. Computer simulations and experiments using a nanoporous anodic aluminum oxide (AAO) thin film as the filter to separate electrolysis with ion concentration gradient are conducted. A high degree coincidence between the theoretical and experimental data is observed.
Subject: Ion diffusion induced current, Nanochannel, Concentration gradient
Publisher: TIMA Editions , Grenoble, France
Date: 2006

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