材料科学
还原剂
单排替反应
镍
原电池
纳米颗粒
化学工程
稳定器(航空)
金属
银纳米粒子
纳米技术
冶金
机械工程
工程类
作者
Anna Pajor-Świerzy,Dorota Gaweł,Elżbieta Drzymała,Robert P. Socha,Magdalena Parlińska-Wojtan,Krzysztof Szczepanowicz,Piotr Warszyński
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2018-10-25
卷期号:30 (1): 015601-015601
被引量:15
标识
DOI:10.1088/1361-6528/aae677
摘要
Nickel–silver core–shell (Ni@Ag) nanoparticles (NPs) were formed in a two-step process: (1) the formation of a dispersion of Ni NPs; and (2) the transmetalation (galvanic displacement) reaction, where the surface of the Ni NPs acted as the reducing agent of Ag ions. Ni NPs were synthesized by the 'wet' chemical method, i.e., by the reduction of metal ions by using NaBH4 as the reducing agent. The influence of the concentration of polymeric stabilizer, reducing agent and Ag precursor on the properties of synthesized NPs was evaluated. In the optimal condition of synthesis, Ni@Ag NPs with about 50 and 210 nm-diameter Ni core coated with a thin (∼10–20 nm) Ag shell, were obtained. Finally, the stability of the synthesized spherical-shaped Ni@Ag NPs was tested and the results indicate long-term stability against aggregation and Ni oxidation. Thus, the resulting NPs are promising candidates for application in electronic devices, e.g., as components of conductive inks or pastes.
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