材料科学
烧结
油胺
电解质
化学工程
纳米颗粒
导电体
原电池
润湿
热分解
复合材料
纳米技术
冶金
有机化学
电极
化学
物理化学
工程类
作者
Xiaofeng Dai,Wen Cai Xu,Teng Zhang,Hang Shi,Tao Wang
标识
DOI:10.1016/j.cej.2019.01.186
摘要
The monodisperse Cu-Ag core-shell nanoparticles ([email protected] NPs) for electric conductive inks were successfully prepared by a simple two-step process consisting of thermal decomposition and galvanic displacement. It was found that 20 mol.% coverage of Ag enabled [email protected] NPs oxidation resisting with air. A new approach to achieve coalescence and sintering of [email protected] NPs at room temperature was proposed. 1-amino-2-propanol (MIPA), hydrophilic amine with a short C-chain, was first applied to replace the strong stabilizer, the strong stabilizer oleylamine (OAM) adsorbed on particles, thereby obtained preliminary agglomeration and hydrophobic -to- hydrophilic transition to improve the wetting capability of electrolyte solution on the surface of metal film. Then, the reducing electrolyte NaBH4 solution was used as the destabilizing agent to deeply coalesce particles, and also inhibit the electrochemical corrosion. It takes only a few minutes to achieve sintering in air at room temperature. Due to the effective sintering at room temperature, the conductive patterns could be formed on thermo-sensitive substrates. The eventual resistivity was found to be as low as 36.3 μΩ·cm.
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