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Type: Journal article
Title: The influence of nanopore dimensions on the electrochemical properties of nanopore arrays studied by impedance spectroscopy
Author: Kant, K.
Priest, C.
Shapter, J.
Losic, D.
Citation: Sensors, 2014; 14(11):21316-21328
Publisher: MDPI AG
Issue Date: 2014
ISSN: 1424-8220
Statement of
Krishna Kant, Craig Priest, Joe G. Shapter, and Dusan Losic
Abstract: The understanding of the electrochemical properties of nanopores is the key factor for better understanding their performance and applications for nanopore-based sensing devices. In this study, the influence of pore dimensions of nanoporous alumina (NPA) membranes prepared by an anodization process and their electrochemical properties as a sensing platform using impedance spectroscopy was explored. NPA with four different pore diameters (25 nm, 45 nm and 65 nm) and lengths (5 μm to 20 μm) was used and their electrochemical properties were explored using different concentration of electrolyte solution (NaCl) ranging from 1 to 100 μM. Our results show that the impedance and resistance of nanopores are influenced by the concentration and ion species of electrolytes, while the capacitance is independent of them. It was found that nanopore diameters also have a significant influence on impedance due to changes in the thickness of the double layer inside the pores.
Keywords: anodization; porous alumina; Electrochemical Impedance Spectroscopy (EIS); nanopore arrays
Rights: © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (
RMID: 0030018312
DOI: 10.3390/s141121316
Grant ID:
Appears in Collections:Chemical Engineering publications

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