Generally, the synthesis methodology has appreciable impact on the properties of heteroatom doped graphene. For instance, the specific capacitance of B-doped graphene which was prepared using supercritical fluid processing was found to be 286 F g -1 at 1 A g -1 in 20% KOH solution and two-fold higher than that obtained using hydrothermal method (142 F g -1 ) . This is attributed to the fact that the supercritical heat-treatment induces the more active sites in the graphene sheet and the effective exfoliation of graphene has occurred. Such kind of effective exfoliation is no longer possible in hydrothermal technique where the reaction temperature was set at 180 °C. It has been reported that the reduction in the wetting angle for the N-doped carbon nanofiber from 26.9 to zero upon B-doping which might be due to the fact that the boron atoms over the surface of the electrode more readily attract the anions from the electrolyte as boron is basically a lewis acid .