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標題: Nanopore size estimation by electrochemical impedance spectroscopy analysis
作者: Chien, M.C.
Wang, G.J.
Yu, M.C.
關鍵字: nanopore size estimation;nanopore impedance;electrochemical impedance;spectroscopy (EIS);lipid-membranes;charge transfer;ion-channel;dna;silicon;fabrication;transport;capacitance;microscope;scales
Project: Japanese Journal of Applied Physics
期刊/報告no:: Japanese Journal of Applied Physics, Volume 47, Issue 9, Page(s) 7459-7463.
We present a simple and cost-effective approach by electrochemical impedance spectroscopy (EIS) for the accurate pore sire estimation of silicon based nanopores. This method takes into account the capacitor effects of thee electrical double layer and the resistor effects of the ion concentration inside the nanochannel. The nanopore impedance was modeled as the electrolyte resistance R(f) in series with a parallel ion diffusion circuit charge transfer resistance R(f) with a constant phase element (CPE) that models the behavior of the double layer. EIS analysis, which has been widely employed to measure the energy storage and dissipation properties of physico-chemical systems in a frequency domain, was adopted to obtain the impedance parameters of the nanopores. The nanopore size was then estimated from the impedance parameters. The accuracy of the estimated nanopore size was verified using an transmission electron microscope (TEM) image.
ISSN: 0021-4922
DOI: 10.1143/japp.47.7459
Appears in Collections:生醫工程研究所

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