Cu-Ag core-shell nanoparticles with enhanced oxidation stability for printed electronics

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In this work, we synthesized uniform Cu-Ag core-shell nanoparticles using a facile two-step process that consists of thermal decomposition and galvanic displacement methods. The core-shell structure of these nanoparticles was confirmed through characterization using transmission electron microscopy, energy-dispersive spectroscopy, and x-ray diffraction. Furthermore, we investigated the oxidation stability of the Cu-Ag core-shell nanoparticles in detail. Both qualitative and quantitative x-ray photoelectron spectroscopy analyses confirm that the Cu-Ag core-shell nanoparticles have considerably higher oxidation stability than Cu nanoparticles. Finally, we formulated a conductive ink using the synthesized nanoparticles and coated it onto glass substrates. Following the sintering process, we compared the resistivity of the Cu-Ag core-shell nanoparticles with that of the Cu nanoparticles. The results of this study clearly show that the Cu-Ag core-shell nanoparticles can potentially be used as an alternative to Ag nanoparticles because of their superior oxidation stability and electrical properties.
Publisher
IOP PUBLISHING LTD
Issue Date
2015-10
Language
English
Article Type
Article
Citation

NANOTECHNOLOGY, v.26, no.45

ISSN
0957-4484
DOI
10.1088/0957-4484/26/45/455601
URI
http://hdl.handle.net/10203/205245
Appears in Collection
MS-Journal Papers(저널논문)
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