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Molecular Dynamics Investigation of Hetero Coalescence between Two Ih Ag55 and Cu55 Clusters at Atomic Scale

Molecular Dynamics Investigation of Hetero Coalescence between Two Ih Ag55 and Cu55 Clusters at... Molecular dynamics simulations are performed to explore the coalescence of the two hetero magic Ag55 and Cu55 clusters having icosahedral packing at room temperature, and the structural changes of the alloying Ag–Cu clusters at elevated temperatures. The simulation results reveal the influence of the contacting distances and relative orientations between the two clusters on the coalescing processes as well as the packing patterns of the coalesced binary clusters on heating. The activation energy is used to describe the energy required to initiate the coalescence. The Lode–Nadai parameter's distributions of the coalesced clusters provide more insight into the loading states on the atoms during different stages. The results show that the two clusters appear to form the neck involving twist and “slip” in the initial stage of the coalescence, and the Ag atoms present significant diffusion along the facets of the Cu cluster. As the temperature increases, different packing structures including Icosahedron, core/shell metastable, core@partial‐shell, and half Cu‐half Ag patterns occur. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Theory and Simulations Wiley

Molecular Dynamics Investigation of Hetero Coalescence between Two Ih Ag55 and Cu55 Clusters at Atomic Scale

Liu, Jinhan; Zhang, Lin
Advanced Theory and Simulations , Volume 6 (4) – Apr 1, 2023
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References (26)

Publisher
Wiley
Copyright
© 2023 Wiley‐VCH GmbH
eISSN
2513-0390
DOI
10.1002/adts.202200857
Publisher site
See Article on Publisher Site

Abstract

Molecular dynamics simulations are performed to explore the coalescence of the two hetero magic Ag55 and Cu55 clusters having icosahedral packing at room temperature, and the structural changes of the alloying Ag–Cu clusters at elevated temperatures. The simulation results reveal the influence of the contacting distances and relative orientations between the two clusters on the coalescing processes as well as the packing patterns of the coalesced binary clusters on heating. The activation energy is used to describe the energy required to initiate the coalescence. The Lode–Nadai parameter's distributions of the coalesced clusters provide more insight into the loading states on the atoms during different stages. The results show that the two clusters appear to form the neck involving twist and “slip” in the initial stage of the coalescence, and the Ag atoms present significant diffusion along the facets of the Cu cluster. As the temperature increases, different packing structures including Icosahedron, core/shell metastable, core@partial‐shell, and half Cu‐half Ag patterns occur.

Journal

Advanced Theory and Simulations – Wiley

Published: Apr 1, 2023

Keywords: alloying cluster; atomic simulations; coalescence; Cu–Ag alloys; molecular dynamic

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