Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying

Mikiko Saito, Jun Mizuno, Shunichi Koga, Hiroshi Nishikawa

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトル2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781538668139
DOI
出版ステータスPublished - 2018 11 26
イベント7th Electronic System-Integration Technology Conference, ESTC 2018 - Dresden, Germany
継続期間: 2018 9 182018 9 21

出版物シリーズ

名前2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings

Other

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

ASJC Scopus subject areas

  • ハードウェアとアーキテクチャ
  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料

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