Plasma-assisted synthesis of size-controlled monodisperse submicron gold particles using inkjet droplets

In this study, we synthesized gold spheroidized particles with sub-micrometer diameters via atmospheric-pressure plasma-assisted processing with inkjet droplets. Microdroplets of chloroauric acid (HAuCl₄) solution were generated by an inkjet device with high reproducibility and exposed to radio frequency plasma. The synthesized sub-micrometer gold particles have a very narrow size distribution (3%–9% standard deviation), and their diameters can be controlled in the 0.3–0.6 μm range by adjusting the concentration of the solution. (letter)