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 | |
| 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 |
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ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
Cite this
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
}
TY - GEN
T1 - Control for Au-Ag Nanoporous Structure by Electrodeposition and Dealloying
AU - Saito, Mikiko
AU - Mizuno, Jun
AU - Koga, Shunichi
AU - Nishikawa, Hiroshi
PY - 2018/11/26
Y1 - 2018/11/26
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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85060055557&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060055557&partnerID=8YFLogxK
U2 - 10.1109/ESTC.2018.8546350
DO - 10.1109/ESTC.2018.8546350
M3 - Conference contribution
AN - SCOPUS:85060055557
BT - 2018 7th Electronic System-Integration Technology Conference, ESTC 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
ER -