Synthesis of a graphene nanosheet film with attached amorphous carbon nanoparticles by their simultaneous electrodeposition

Amorphous carbon nanoparticles (a-CNPs) on a graphene nanosheet (GNS) film, deposited on a silicon substrate, were synthesized using simultaneous electrodeposition from a methanol suspension of polydiallyldimethylammonium chloride-modified GNSs. The a-CNPs are homogeneously deposited on the surfaces of the GNSs, forming a dense electrically conductive a-CNP/GNS composite film with good adhesion to the substrate. Such simple and low-cost simultaneous electrodeposition technique makes the a-CNP/GNS composite film attractive for various applications, such as electrodes, capacitors, batteries and field emitters. (C) 2010 Elsevier Ltd. All rights reserved.