AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Surface-Enriched Zinc on Copper Particles Generated via Spray Pyrolysis
Ryan Felix, Joseph Repac, Afshan Urooj, Howard Glicksman, SHERYL EHRMAN, University of Maryland College Park
Abstract Number: 404 Working Group: Nanoparticles and Materials Synthesis
Abstract Copper has been considered as an inexpensive replacement for silver in electronic applications such as solar cell metallization, electromagnetic interference packaging, and printable electronics. However, copper oxidizes much easier than silver and copper oxidation is continuous rather than self-limiting. Recently our group has explored addition of a second metal to copper to promote formation of a sacrificial oxide barrier layer that would prevent continuous oxidation of copper. Here, we describe a single step spray pyrolysis process for formation of zinc-copper particles at compositions ranging from pure copper to 45 at% zinc. The resulting particles were enriched in zinc at the surface, determined with X-ray photoelectron spectroscopy combined with ion beam sputtering, even though the precursor consisted of a uniformly mixed aqueous phase mixture of zinc chloride and copper nitrate salts. No oxide phases were detected using X-ray diffraction. Also with X-ray diffraction, we observed the formation of an unexpected metal ammine chloride complex under certain reaction conditions. High reaction temperatures (1000 C) promoted formation of the target morphology, smooth dense particles formed by droplet to particle reaction.