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Atomic-scale phase separation induced clustering of solute atoms
Dealloying typically occurs via the chemical dissolution of an alloy component through a corrosion process. In contrast, here we report an atomic-scale nonchemical dealloying process that results in the clustering of solute atoms. We show that the disparity in the adatom–substrate exchange barriers...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7415157/ https://www.ncbi.nlm.nih.gov/pubmed/32769992 http://dx.doi.org/10.1038/s41467-020-17826-w |
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author | Zou, Lianfeng Cao, Penghui Lei, Yinkai Zakharov, Dmitri Sun, Xianhu House, Stephen D. Luo, Langli Li, Jonathan Yang, Yang Yin, Qiyue Chen, Xiaobo Li, Chaoran Qin, Hailang Stach, Eric A. Yang, Judith C. Wang, Guofeng Zhou, Guangwen |
author_facet | Zou, Lianfeng Cao, Penghui Lei, Yinkai Zakharov, Dmitri Sun, Xianhu House, Stephen D. Luo, Langli Li, Jonathan Yang, Yang Yin, Qiyue Chen, Xiaobo Li, Chaoran Qin, Hailang Stach, Eric A. Yang, Judith C. Wang, Guofeng Zhou, Guangwen |
author_sort | Zou, Lianfeng |
collection | PubMed |
description | Dealloying typically occurs via the chemical dissolution of an alloy component through a corrosion process. In contrast, here we report an atomic-scale nonchemical dealloying process that results in the clustering of solute atoms. We show that the disparity in the adatom–substrate exchange barriers separate Cu adatoms from a Cu–Au mixture, leaving behind a fluid phase enriched with Au adatoms that subsequently aggregate into supported clusters. Using dynamic, atomic-scale electron microscopy observations and theoretical modeling, we delineate the atomic-scale mechanisms associated with the nucleation, rotation and amorphization–crystallization oscillations of the Au clusters. We expect broader applicability of the results because the phase separation process is dictated by the inherent asymmetric adatom-substrate exchange barriers for separating dissimilar atoms in multicomponent materials. |
format | Online Article Text |
id | pubmed-7415157 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-74151572020-08-17 Atomic-scale phase separation induced clustering of solute atoms Zou, Lianfeng Cao, Penghui Lei, Yinkai Zakharov, Dmitri Sun, Xianhu House, Stephen D. Luo, Langli Li, Jonathan Yang, Yang Yin, Qiyue Chen, Xiaobo Li, Chaoran Qin, Hailang Stach, Eric A. Yang, Judith C. Wang, Guofeng Zhou, Guangwen Nat Commun Article Dealloying typically occurs via the chemical dissolution of an alloy component through a corrosion process. In contrast, here we report an atomic-scale nonchemical dealloying process that results in the clustering of solute atoms. We show that the disparity in the adatom–substrate exchange barriers separate Cu adatoms from a Cu–Au mixture, leaving behind a fluid phase enriched with Au adatoms that subsequently aggregate into supported clusters. Using dynamic, atomic-scale electron microscopy observations and theoretical modeling, we delineate the atomic-scale mechanisms associated with the nucleation, rotation and amorphization–crystallization oscillations of the Au clusters. We expect broader applicability of the results because the phase separation process is dictated by the inherent asymmetric adatom-substrate exchange barriers for separating dissimilar atoms in multicomponent materials. Nature Publishing Group UK 2020-08-07 /pmc/articles/PMC7415157/ /pubmed/32769992 http://dx.doi.org/10.1038/s41467-020-17826-w Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zou, Lianfeng Cao, Penghui Lei, Yinkai Zakharov, Dmitri Sun, Xianhu House, Stephen D. Luo, Langli Li, Jonathan Yang, Yang Yin, Qiyue Chen, Xiaobo Li, Chaoran Qin, Hailang Stach, Eric A. Yang, Judith C. Wang, Guofeng Zhou, Guangwen Atomic-scale phase separation induced clustering of solute atoms |
title | Atomic-scale phase separation induced clustering of solute atoms |
title_full | Atomic-scale phase separation induced clustering of solute atoms |
title_fullStr | Atomic-scale phase separation induced clustering of solute atoms |
title_full_unstemmed | Atomic-scale phase separation induced clustering of solute atoms |
title_short | Atomic-scale phase separation induced clustering of solute atoms |
title_sort | atomic-scale phase separation induced clustering of solute atoms |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7415157/ https://www.ncbi.nlm.nih.gov/pubmed/32769992 http://dx.doi.org/10.1038/s41467-020-17826-w |
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