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

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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.

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Authors and Affiliations

  1. Department of Chemical Engineering, Kwangwoon University, Seoul, 139-701, Korea

    Ha-Nee Umh, Hyeon Ho Shin & Younghun Kim

  2. School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Korea

    Ha-Nee Umh & Jongheop Yi

Authors
  1. Ha-Nee Umh
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  2. Hyeon Ho Shin
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  3. Jongheop Yi
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  4. Younghun Kim
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Correspondence to Younghun Kim.

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Umh, HN., Shin, H.H., Yi, J. et al. Fabrication of gold nanowires (GNW) using aluminum anodic oxide (AAO) as a metal-ion sensor. Korean J. Chem. Eng. 32, 299–302 (2015). https://doi.org/10.1007/s11814-014-0201-5

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  • DOI: https://doi.org/10.1007/s11814-014-0201-5

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