Plasma-related techniques have been regarded as an eco-friendly and energy-saving approach for etching,deposition and novel surface modifications of functional materials.In the present work,we report on the fabrication of reduced graphene oxide(rGO)decorated with uniform metal or metal oxide nanoparticles smaller than 5 nm in size,such as Pt,Ru,PtRu,Ni,and NiO by DBD plasma technology.It has been demonstrated that the metal nanoparticles can be deposited on both sides of rGO sheets due to their large surface area and unique basal 2D planar structure.Novel composites consisting of NiO nanosheets or porous rod-shaped Fe3O4 anchored on rGO are also fabricated by controlling the in situ nucleation and growth of metallic hydroxides onto the graphene oxide and followed by DBD hydrogen plasma treatment.Such well-designed hierarchical nanostructures are beneficial for maximum utilization of electrochemically active matter in lithium ion batteries,evidenced by their superior Li uptake with high reversible capacity,good rate capability,and excellent stability.The results lead one to believe that the DBD plasma method is fast and easy for large-scale production of graphene under mild conditions,and holds promise for the efficient production of temperature-sensitive graphene-based nanocomposites.