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

机译：具有增强的氧化稳定性的铜-银核壳纳米粒子，用于印刷电子产品

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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.
机译：在这项工作中，我们使用由热分解和电流置换法组成的简便的两步法合成了均一的Cu-Ag核壳纳米粒子。这些纳米颗粒的核-壳结构通过使用透射电子显微镜，能量分散光谱和X射线衍射的表征得到证实。此外，我们详细研究了铜-银核壳纳米粒子的氧化稳定性。定性和定量X射线光电子能谱分析均证实，Cu-Ag核壳纳米粒子具有比Cu纳米粒子高得多的氧化稳定性。最后，我们使用合成的纳米粒子配制了一种导电油墨，并将其涂布在玻璃基板上。在烧结过程之后，我们将Cu-Ag核壳纳米粒子的电阻率与Cu纳米粒子的电阻率进行了比较。这项研究的结果清楚地表明，由于具有优异的氧化稳定性和电性能，Cu-Ag核壳纳米粒子可以潜在地替代Ag纳米粒子。

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