Cu Nanoparticles From Evaporation of Cu Granule in a Microwave Torch Plasma at Atmospheric Pressure

The copper (Cu) nanoparticles (Cu-NPs) were obtained directly by evaporation of Cu granules in an atmospheric microwave plasma torch flame with a possibility for direct continuous preparation and mass production of Cu-NPs. The microwave plasma generated in a mixture of nitrogen (N
₂
) and argon (Ar) gases evaporates Cu granules and produces Cu-NPs. This template- and catalyst-free process may be promising for the practical production and application of Cu-NPs.