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2016 | "Fabrication of dendritic silver-coated copper powders by galvanicdisp…

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작성자 관리자 /   작성일2016-10-26 /   조회1,200회

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Title : Fabrication of dendritic silver-coated copper powders by galvanicdisplacement reaction and their thermal stability against oxidation
Authors: Yu-Seon Park, Chang Yong An, Padmanathan Karthick Kannan, Nary Seo, Kai Zhuo, Tae Kyong Yoo, and Chan-Hwa Chung

Journal : Applied Surface Science
Vol/No/Page : 389/865-873
DOI : 10.1016/j.apsusc.2016.08.008

Abstract :
tTwo steps of wet chemical processes have been developed for the preparation of core-shell nanostruc-tures of copper and silver, which is a facile and low cost method for the production of large quantity ofdendritic powders. First step involves a galvanic displacement reaction with hydrogen evolution which isthe motive force of spontaneous electrochemical reaction. To achieve the core-shell structure, silver hasbeen coated on the dendritic copper using the galvanic displacement reaction. The dendritic silver-coatedcopper powders exhibit high surface-area, excellent conductivity, and good oxidation resistance. It hasbeen found that silver-coated copper powders maintain the electrical conductivity even after annealingat 150◦C for several to tens of minutes, thus it is a promising material and an alternative to pure silverpowders in printed electronics application.

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