The GNP system studied was First Graphene's PureGraph PG-10 Graphene, a graphitic, platelet material with typical quoted lateral size of 10 µm. The Haydale HT60 Plasma Reactor was used to carry out plasma treatment. It enables the functionalisation of lab scale quantities of nanomaterial powder; with larger reactors capable of treating commercial quantities. The treatment was carried out on 50 g batches of GNP, at low pressures (< 10 mbar) and temperatures (< 100 °C) using CF4 and NH3 process gases for fluorination and amination respectively.