When in 2004 graphene was separated from graphite for the first time, a large number of wideranging possibilities were imagined. Since then, this material has become one of the most exciting topics within the materials sector and it has stimulated a vast amount of research. In this sense, there is no doubt that graphene is a very important discovery as can be demonstrated by the number of publications.
The interest in this material lies not only in its distinctive structure, which is a one-atom-thick planar sheet densely packed in a honeycomb crystal lattice, but also in its special characteristics. Considered to be the most important properties of graphene are quantum Hall effect, ambipolar electric field effect along with ballistic conduction of charge carriers, tunable gap and high elasticity. In fact, the single graphene layer is a semi-metal or zero-gap semiconductor and has excellent electronic properties. The electron mobility of graphene is very high; conducting electricity faster than any other substance at room temperature. Moreover, graphene is even harder than diamond and about 100 times stronger than the best steel in the world. Therefore, due to its excellent properties, graphene is a potential candidate for use in high performance nanoelectronic devices, composite materials, field emission materials, molecular sensors, artificial muscle actuators, energy storage areas, etc