title: Stable aqueous based Cu nanoparticle ink for printing well-defined highly conductive features on a plastic substrate.
abstract: 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.
authors.affiliation: Device Materials Research Center, Korea Research Institute of Chemical Technology , 19 Sinseongno, Yuseong-gu, Daejeon 305-600, Korea.
authors.forename: Sunho
authors.initials: S
authors.lastname: Jeong
authors.forename: Hae Chun
authors.initials: HC
authors.lastname: Song
authors.forename: Won Woo
authors.initials: WW
authors.lastname: Lee
authors.forename: Sun Sook
authors.initials: SS
authors.lastname: Lee
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Choi
authors.forename: Wonil
authors.initials: W
authors.lastname: Son
authors.forename: Eui Duk
authors.initials: ED
authors.lastname: Kim
authors.forename: Choon Hoon
authors.initials: CH
authors.lastname: Paik
authors.forename: Seok Heon
authors.initials: SH
authors.lastname: Oh
authors.forename: Beyong-Hwan
authors.initials: BH
authors.lastname: Ryu