GRAPHENE OXIDE MATERIAL AND METHOD FOR THE PRODUCTION THEREOF

A method of producing a multi-layered functionalised graphene oxide paper, comprises the steps of providing an aqueous suspension of oxidised graphene oxide flakes, size reducing the oxidised graphene oxide flakes in the suspension to provide an aqueous suspension of particulate oxidised graphene oxide having an average particle size of less than 1 μm and drying the aqueous suspension in a vessel to provide a multi-layered graphene oxide material. The multi-layered graphene oxide material is annealed to provide a multi-layered reduced graphene oxide material, before surface grafting functional groups to the surface of the multi-layered reduced graphene oxide material by reacting the material with a functional group precursor in the presence of plasma. The use of a graphene oxide material to treat bone defects, and as an energy storage device, is also described.