Device Materials Research Center, Korea Research Institute of Chemical Technology , 19 Sinseongno, Yuseong-gu, Daejeon 305-600, Korea.
Langmuir. 2011 Mar 15;27(6):3144-9. doi: 10.1021/la104136w. Epub 2011 Feb 21.
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.
为了在塑料基底上喷墨打印出高度导电且轮廓清晰的铜结构，首次使用具有极薄表面氧化层的水溶性铜纳米粒子制备了水基铜油墨。由于水的特殊性质，如高表面张力和低沸点，水基铜油墨在打印狭窄的导电图案时，与基于有机溶剂的传统铜油墨相比，具有多种优势，不会出现不规则的形态。本文展示了水基油墨的设计如何影响印刷导电结构的基本特性，如表面形貌、微观结构、导电性和线宽。通过 X 射线光电子能谱（XPS）研究水基油墨中表面氧化层的演变，分析了水基铜油墨对氧化的长期稳定性。
