Modeling of Ion Diffusion Induced Current through a NanochannelReport as inadecuate

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1 Dep. of Mechanical Engineering 2 Institute of Industrial Engineering

Abstract : In 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.

keyword : Ion diffusion induced current Nanochannel Concentration gradient

Author: Ming-Chun Chien - F.-C. Yang - G.-J. Wang -



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