学術雑誌論文

学術雑誌論文

text

Physical Review B. 2022, 105, p. 125401

Restructuring in bimetallic core-shell nanoparticles: Real-time observation

American Physical Society (APS)

英語

text

2022-03-01

https://doi.org/10.1103/PhysRevB.105.125401

Nakamura Nobutomo, Matsuura Koji, Ishii Akio and Ogi Hirotsugu. Restructuring in bimetallic core-shell nanoparticles: Real-time observation. Physical Review B, 105, 125401, 2022. https://doi.org/10.1103/PhysRevB.105.125401.

The formation process of core-shell bimetallic nanoparticles synthesized by sputtering onto a substrate is observed in real time using an originally developed acoustic technique. The technique enables us to evaluate the structural change of nanoparticles at room temperature without contacting the nanoparticles or substrate. In the experiments, the sputtering of metal A followed by metal B tended to form B-shell/A-core nanoparticles. However, in Pd-Au alloy system, notable restructuring occurred during synthesis, resulting in the formation of A-shell/B-core nanoparticles. The formation process is analyzed using the molecular dynamics simulation, revealing that this restructuring occurs on a short timescale, and high diffusivity of Au plays an important role.

Copyright 2022 by the American Physical Society.

86423

Restructuring in bimetallic core-shell nanoparticles: Real-time observation

American Physical Society (APS)

英語

2022-03-01

Physical Review B

105

125401

https://doi.org/10.1103/PhysRevB.105.125401

https://hdl.handle.net/11094/86423