Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying

Mikiko Saito, Jun Mizuno, Shunichi Koga, Hiroshi Nishikawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigated the composition, morphology, and dissolution behavior of an Au-Ag nanoporous structure formed by electrodeposition and dealloying. Formation of the films was carried out by changing the bath composition and the annealing temperature. The amount of Ag decreased from 70 wt. % to 45-50 wt. % after dealloying. As seen from analysis by a glow discharge optical emission spectrometer (GDOES), not only the amount of Ag, but also that of Au was decreased after dealloying, and a highly concentrated Ag layer was generated at the surface. When the Ag dissolves, an underpotential deposition (UPD) might be introduced, followed by the generation of a high concentration of Ag. From the anodic polarization measurement, the anodic current densities of the samples under 1.5 V were larger than those of the samples under 1.0 V, resulting in the generation of many nanopores. It was confirmed that dealloying involved three processes: whole film dissolution (includes Au dissolution), defects dissolution at the grain boundary, and Ag-selective dissolution.

Original languageEnglish
Title of host publication2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538668139
DOIs
Publication statusPublished - 2018 Nov 26
Event7th Electronic System-Integration Technology Conference, ESTC 2018 - Dresden, Germany
Duration: 2018 Sep 182018 Sep 21

Other

Other7th Electronic System-Integration Technology Conference, ESTC 2018
CountryGermany
CityDresden
Period18/9/1818/9/21

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Saito, M., Mizuno, J., Koga, S., & Nishikawa, H. (2018). Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying. In 2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings [8546350] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ESTC.2018.8546350