Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying

Mikiko Saito; Jun Mizuno; Shunichi Koga; Hiroshi Nishikawa

doi:10.1109/ESTC.2018.8546350

Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying

Mikiko Saito, Jun Mizuno, Shunichi Koga, Hiroshi Nishikawa

Research Organization for Nano & Life Innovation

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538668139
DOIs	https://doi.org/10.1109/ESTC.2018.8546350
Publication status	Published - 2018 Nov 26
Event	7th Electronic System-Integration Technology Conference, ESTC 2018 - Dresden, Germany Duration: 2018 Sep 18 → 2018 Sep 21

Other

Other	7th Electronic System-Integration Technology Conference, ESTC 2018
Country	Germany
City	Dresden
Period	18/9/18 → 18/9/21

ASJC Scopus subject areas

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

Access to Document

10.1109/ESTC.2018.8546350

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Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying. / Saito, Mikiko ; Mizuno, Jun; Koga, Shunichi; Nishikawa, Hiroshi.

2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. 8546350.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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., 7th Electronic System-Integration Technology Conference, ESTC 2018, Dresden, Germany, 18/9/18. https://doi.org/10.1109/ESTC.2018.8546350

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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.",

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N2 - 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.

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