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Facile synthesis of nearly monodisperse AgCu alloy nanoparticles with synergistic effect against oxidation and electromigration

Published online by Cambridge University Press:  12 March 2019

Qianqian Dou Open the ORCID record for Qianqian Dou [Opens in a new window] ,
Yang Li ,
Ka Wai Wong  and
Ka Ming Ng
Qianqian Dou
Affiliation:
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Yang Li
Affiliation:
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Ka Wai Wong
Affiliation:
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
Ka Ming Ng*
Affiliation:
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China
*
a)Address all correspondence to this author. e-mail: kekmng@ust.hk
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Abstract

Bimetallic nanoparticles (NPs) have attracted a great deal of attention due to the synergistic interaction between metal components. In this work, the thermal process in which the reducing agent is not expensive or hazardous as those in traditional methods was employed to prepare alloy Ag–Cu NPs. The molar ratio between Ag and Cu was varied from 1:9 to 9:1. Nearly monodisperse NPs with alloy structure were characterized by X-ray diffraction and high-resolution transmission electron microscopy with energy dispersive spectroscopy In comparison with monometallic Ag and Cu NPs, the alloyed Ag–Cu NPs showed better monodispersity, especially when the ratio between Ag and Cu was 1:1. Moreover, the alloyed Ag–Cu NPs exhibited enhanced resistance to electromigration and oxidation, the respective problem of pure Ag and Cu. The alloyed Ag–Cu NPs also exhibited improved properties than a mixture of Ag–Cu NPs. This study should serve as the foundation for exploring high performance alloyed bimetallic NPs.

Keywords

coppersilveralloyoxidationelectromigration
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 12 , 28 June 2019 , pp. 2095 - 2104
Copyright
Copyright © Materials Research Society 2019 

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