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The growth mechanism by stabilizing certain facets of Au in spines by underpotential deposition of Ag was investigated. The nanoparticles were analyzed primarily by STEM and EDS. Analysis of spines on nanoparticles synthesized with an Au/Ag ratio of 18/4 revealed that approximately 1 nm of Ag was deposited on the topmost surface of Au, and the growth direction of spines was <200>. Underpotential deposition of Ag nanolayers on specific facets of the spines on nanoparticles was observed for the first time by elemental mapping and HAADF STEM tomography.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

  © 2024. Licensed under the Creative Commons https://creativecommons.org/licenses/by-nc-nd/4.0/.

キーワード: Star-shaped Au-Ag nanoparticles, Growth mechanism, underpotential deposition, plasmonic nanoparticles

刊行年月日: 2024-03-01

出版者: Elsevier BV

掲載誌:

• Materials Today Nano (ISSN: 25888420) vol. 25 100468

研究助成金:

• Japan Society for the Promotion of Science 23K11845
• Ministry of Education, Culture, Sports, Science and Technology A-21-NM-0080
• National Institute for Materials Science

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4684

公開URL: https://doi.org/10.1016/j.mtnano.2024.100468

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更新時刻: 2026-03-01 12:30:08 +0900

MDRでの公開時刻: 2026-03-01 09:37:26 +0900