Surface-modification and Ag nanoparticles support of graphene nanoplates via plasma in liquid

Graphene nanoplates (GNP) were modified via the plasma in liquid process (PLP) with two types of aqueous solutions for the fabrication of hydroxylated GNP and Ag-nanoparticles-physisorbed GNP. GNP were hydroxylated using the PLP in NaCl and hydroquinone aqueous solution. During the PLP employing AgNO3 aqueous solution, crystalized Ag nanoparticles with a diameter of around 10-100 nm were physisorbed on GNP with little functionalization. It was found that the amount of hydroxyl groups and Ag nanoparticles increased with the plasma treatment time. (C) 2020 The Japan Society of Applied Physics