Fabrication of Ultramicroelectrodes with Nanoporous Gold Structures by Potentiostatic Anodization

Journal of the Korean Chemical Society

article

Seoin Shin¹  Siyeon Lee¹  Jongwon Kim¹ 

[1] Department of Chemistry, Chungbuk National University

关键词: Ultramicroelectrode;    Nanoporous gold;    Anodization;    Potentiostatic;    Roughness factor;   

DOI  :  10.5012/jkcs.2022.66.6.436

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Because the nanoporous electrodes has large electrochemical surface areas, extensive studies have beenfocused on their fabrication methods. In this paper, a method for introducing a nanoporous gold (NPG) structure on the surface of an ultramicroelectrode (UME) using potentiostatic anodization was investigated. A well-defined NPG structure wasintroduced on the surface of the UME when a potential of 1.3 V was applied in 0.1 M phosphate buffer solution (pH 8) containing 1 M KCl. The anodic oxidation efficiency was investigated by observing the effect of the applied potential, the reaction time, and the size of the electrode on the roughness factor (Rf) of the prepared NPG-UMEs. In a short time of about 10minutes, NPG-UME with a large Rf value of about 2000 could be prepared, which could be effectively used for electrochemical glucose detection. The results shown in this work are expected to have great applicability when performing electrochemical analysis with a small sample volume.

【 授权许可】

Unknown