Graphene is known as conductive nanofiller due to remarkable and excellent characteristic properties such as high surface area, aspect ratio, electrical conductivity, thermal conductivity, low coefficient of thermal expansion, tensile strength, flexibility, EMI shielding ability and transparency. These intrinsic properties have generated enormous interest for development of “graphenium” devices with high speed and radio frequency logic devices, thermally and electrically conducting nanocomposite materials, electronic circuits, ultra-thin carbon films, sensors, transparent and flexible electrodes for displays and solar cells. Graphene sheets have shown various characteristic properties which are mainly dependent on fabrication methods, surface modification and functionalisation [1–11].