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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 13, 2014
Accepted July 13, 2014

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fabrication of gold nanowires (GNW) using aluminum anodic oxide (AAO) as a metal-ion sensor

Ha-Nee Umh^{1 2} Hyeon Ho Shin¹ Jongheop Yi² Younghun Kim^1†

¹Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, Korea ²School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea

korea1@kw.ac.kr

Korean Journal of Chemical Engineering, February 2015, 32(2), 299-302(4), 10.1007/s11814-014-0201-5

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Abstract

Anodic aluminum oxide (AAO) is a self-organized nanostructured material that contains high-density, uniform cylindrical pores that are aligned perpendicularly to the surface of the materials. Therefore, AAO nanostructures are very useful templates for applications such as electrochemical detection of metal ions and fabrication of nanowires or nanotubes. We fabricated an AAO template thorough two-step anodizing as an electrochemical sensing electrode. Gold nanowire (GNW) was prepared via in-situ electrochemical deposition on the AAO template. Then, the GNW/AAO electrode was functionalized with 1,6-hexadecanethiol. In the electrochemical analysis, the electron signals of the GNW/AAO changed by combining mercury ion and the thiol group on the electrode. The amperometric response was determined in the presence of the mercury ions. Consequently, a proof-of-concept test showed that the GNW/AAO electrode is a possible tool that can act as a heavy metal ion sensor.

Keywords

Nanostructures Microstructure Electrochemical Measurements Electron Microscopy

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