title: Effect of Liquid Media on the Formation of Multi-Layer Graphene-Synthesized Metal Particles.
abstract: We report a simple approach for the production of copper nanoparticles by a wire explosion process that creates different structures in deionized (DI) water versus isopropyl alcohol (IPA) liquid media. In DI water, copper nanoparticles (CNs) are formed, while multi-layer graphene-synthesized copper nanoparticles (MGCNs) with a high degree of graphitization are formed in the IPA liquid media. The nanoparticles have an average diameter ranging from 10 nm to 300 nm and a quasi-spherical morphology. The morphologies and sizes of nanoparticles formed via this method were characterized by high-resolution transmission electron microscopy (HRTEM), field-emission scattering electron microscopy (FESEM), and analysis of dynamic light scattering (DLS). The microstructures and chemical bonding of the nanoparticles were studied by X-ray diffraction (XRD), Raman spectra measurement, and X-ray photoelectron spectroscopy (XPS). This results show an easily reproducible way to synthesize metal-core nanoparticles with multi-layer graphene shells based onto the liquid media used during synthesis. These materials can be used in the field of energy storage and as additives in the near future.
authors.forename: Jung Woo
authors.initials: JW
authors.lastname: Lee
authors.forename: Tae-Yoo
authors.initials: TY
authors.lastname: Kim
authors.forename: Young Lae
authors.initials: YL
authors.lastname: Cho
authors.forename: Young Il
authors.initials: YI
authors.lastname: Na
authors.forename: Yoon Sik
authors.initials: YS
authors.lastname: Kim
authors.forename: Young Il
authors.initials: YI
authors.lastname: Song
authors.forename: Su Jeong
authors.initials: SJ
authors.lastname: Suh