Preparation of nickel-silver core-shell nanoparticles by liquid-phase reduction for use in conductive paste

Nickel-silver (Ni-Ag) core-shell nanoparticles (NPs) were prepared by depositing Ag on Ni nanocores using the liquid-phase reduction technique in aqueous solution, and their properties were characterised using various experimental techniques. The core-shell NPs had good crystallinity, and the thickn...

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Bibliographic Details
Published inJournal of experimental nanoscience Vol. 10; no. 17; pp. 1347 - 1356
Main Authors Jing, Jun Jie, Xie, Jimin, Chen, Gao Yuan, Li, Wen Hua, Zhang, Ming Mei
Format Journal Article
LanguageEnglish
Published Taylor & Francis 22.11.2015
Subjects
conductive paste
core-shell structure
liquid-phase reduction
nickel
silver
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Summary:Nickel-silver (Ni-Ag) core-shell nanoparticles (NPs) were prepared by depositing Ag on Ni nanocores using the liquid-phase reduction technique in aqueous solution, and their properties were characterised using various experimental techniques. The core-shell NPs had good crystallinity, and the thicknesses of the Ag nanoshells could be tuned effectively. The oxidation resistance of the Ag surface and the electroconductive properties of the Ni core allowed these Ni-Ag core-shell NPs to be used in a conductive paste. Thick films composed of Ni-Ag core-shell NPs were screen-printed on a polycrystalline silicon substrate then sintered at temperatures ranging from 500 °C to 800 °C. Stable resistivity was obtained when the sintering temperature was higher than 650 °C, and the electrical properties of the Ni-Ag core-shell paste were close to those of pure Ag paste. Thus, the Ni-Ag NPs can partly replace pure Ag NPs in conductive pastes.
ISSN:1745-8080
1745-8099
DOI:10.1080/17458080.2015.1012751