Fabrication and surface functionalization of nanoporous gold by electrochemical alloying/dealloying of Au-Zn in an ionic liquid, and the self-assembly of L-cysteine monolayers

Jing Fang Huang, I. Wen Sun

研究成果: Article同行評審

227 引文 斯高帕斯(Scopus)

摘要

This paper describes a totally electrochemical process for the fabrication and functionalization of high-surface-area, nanoporous gold films. The fabrication process involves the electrodeposition of a binary gold-zinc alloy at gold wires, followed by subsequent electrochemical dealloying of the less noble component zinc from the surface. Both the deposition and dealloying steps are conducted in a single low-temperature bath of 40.0-60.0 mol-% zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquid at 120 °C without using any other corrosive acids or bases. The porous structure and morphology of the nanostructured gold film could be controlled by electrochemical variation of the composition of the Au-Zn surface alloy. It is demonstrated that the nanoporous gold surface can be successfully functionalized with self-assembled monolayers of L-cysteine. Such functionalization greatly improves the utility of the nanoporous gold, as is demonstrated in the sensitive and selective determination of Cu(II).

原文English
頁(從 - 到)989-994
頁數6
期刊Advanced Functional Materials
15
發行號6
DOIs
出版狀態Published - 2005 6月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學

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