Stable Aqueous Based Cu Nanoparticle Ink for Printing Well-Defined Highly Conductive Features on a Plastic Substrate

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• 作者：Sunho Jeong ; Hae Chun Song ; Won Woo Lee ; Sun Sook Lee ; Youngmin Choi ; Wonil Son ; Eui Duk Kim ; Choon Hoon Paik ; Seok Heon Oh ; Beyong-Hwan Ryu
• 刊名：Langmuir
• 出版年：2011
• 出版时间：March 15, 2011
• 年：2011
• 卷：27
• 期：6
• 页码：3144-3149
• 全文大小：836K
• 年卷期：v.27,no.6(March 15, 2011)
• ISSN：1520-5827

文摘

With the aim of inkjet printing highly conductive and well-defined Cu features on plastic substrates, aqueous based Cu ink is prepared for the first time using water-soluble Cu nanoparticles with a very thin surface oxide layer. Owing to the specific properties, high surface tension and low boiling point, of water, the aqueous based Cu ink endows a variety of advantages over conventional Cu inks based on organic solvents in printing narrow conductive patterns without irregular morphologies. It is demonstrated how the design of aqueous based ink affects the basic properties of printed conductive features such as surface morphology, microstructure, conductivity, and line width. The long-term stability of aqueous based Cu ink against oxidation is analyzed through an X-ray photoelectron spectroscopy (XPS) based investigation on the evolution of the surface oxide layer in the aqueous based ink.