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Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study

The preparation of alloyed bimetallic nanoparticles (BNPs) between immiscible elements is always a huge challenge due to the lack of thermodynamic driving forces. W–Cu is a typical immiscible binary system, and it is difficult to alloy them under conventional circumstances. Here, we used the bond en...

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Autores principales: Zhang, Hongbo, Liu, Tao, Zhao, Siqi, Xu, Zhanyuan, Lv, Yaozha, Fan, Jinglian, Han, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073633/
https://www.ncbi.nlm.nih.gov/pubmed/33923874
http://dx.doi.org/10.3390/nano11041047
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author Zhang, Hongbo
Liu, Tao
Zhao, Siqi
Xu, Zhanyuan
Lv, Yaozha
Fan, Jinglian
Han, Yong
author_facet Zhang, Hongbo
Liu, Tao
Zhao, Siqi
Xu, Zhanyuan
Lv, Yaozha
Fan, Jinglian
Han, Yong
author_sort Zhang, Hongbo
collection PubMed
description The preparation of alloyed bimetallic nanoparticles (BNPs) between immiscible elements is always a huge challenge due to the lack of thermodynamic driving forces. W–Cu is a typical immiscible binary system, and it is difficult to alloy them under conventional circumstances. Here, we used the bond energy model (BEM) to calculate the effect of size on the alloying ability of W–Cu systems. The prediction results show that reducing the synthesis size (the original size of W and Cu) to less than 10 nm can obtain alloyed W–Cu BNPs. Moreover, we prepared alloyed W50Cu50 BNPs with a face-centered-cubic (FCC) crystalline structure via the nano in situ composite method. Energy-dispersive X-ray spectroscopy (EDS) coupled with scan transmission electron microscopy (STEM) confirmed that W and Cu are well mixed in a single-phase particle, instead of a phase segregation into a core-shell or other heterostructures. The present results suggest that the nanoscale size effect can overcome the immiscibility in immiscible binary systems. In the meantime, this work provided a high-yield and universal method for preparing alloyed BNPs between immiscible elements.
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spelling pubmed-80736332021-04-27 Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study Zhang, Hongbo Liu, Tao Zhao, Siqi Xu, Zhanyuan Lv, Yaozha Fan, Jinglian Han, Yong Nanomaterials (Basel) Article The preparation of alloyed bimetallic nanoparticles (BNPs) between immiscible elements is always a huge challenge due to the lack of thermodynamic driving forces. W–Cu is a typical immiscible binary system, and it is difficult to alloy them under conventional circumstances. Here, we used the bond energy model (BEM) to calculate the effect of size on the alloying ability of W–Cu systems. The prediction results show that reducing the synthesis size (the original size of W and Cu) to less than 10 nm can obtain alloyed W–Cu BNPs. Moreover, we prepared alloyed W50Cu50 BNPs with a face-centered-cubic (FCC) crystalline structure via the nano in situ composite method. Energy-dispersive X-ray spectroscopy (EDS) coupled with scan transmission electron microscopy (STEM) confirmed that W and Cu are well mixed in a single-phase particle, instead of a phase segregation into a core-shell or other heterostructures. The present results suggest that the nanoscale size effect can overcome the immiscibility in immiscible binary systems. In the meantime, this work provided a high-yield and universal method for preparing alloyed BNPs between immiscible elements. MDPI 2021-04-20 /pmc/articles/PMC8073633/ /pubmed/33923874 http://dx.doi.org/10.3390/nano11041047 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Hongbo
Liu, Tao
Zhao, Siqi
Xu, Zhanyuan
Lv, Yaozha
Fan, Jinglian
Han, Yong
Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title_full Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title_fullStr Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title_full_unstemmed Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title_short Size-Dependent Alloying Ability of Immiscible W-Cu Bimetallic Nanoparticles: A Theoretical and Experimental Study
title_sort size-dependent alloying ability of immiscible w-cu bimetallic nanoparticles: a theoretical and experimental study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073633/
https://www.ncbi.nlm.nih.gov/pubmed/33923874
http://dx.doi.org/10.3390/nano11041047
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