Abstract:
Carbon is one of the most important elements in the periodic table and the source of life.[1]
Besides its important role in organic chemistry, it forM.S. many allotropes, two being known from
ancient times (diamond and graphite) and some discovered recently (fullerenes and nanotubes).[2-
4] The new two-dimensional form of carbon, graphene, consisting of atomically thin sp2 bonded
carbon atoM.S. has attracted widespread attention from the scientific community.[5-7] Graphene
with interesting electronic, optical, high mechanical strength and chemical properties have wide
range of applications.[7-9] It is used in energy storage devices, sensors, gas storage, electronics,
optical, optoelectronic devices and polymer composites.[7, 8, 10, 11] Graphene normally refer to a
single-layer of sp2 bonded carbon atoM.S., the properties of bi- and few- layer graphene
synthesized using different chemical and physical methods have been investigated in detail.[12, 13]
Graphene initially was obtained by micromechanical cleavage of graphite.[5] This method allows
to get high quality graphene, but is not suitable for large scale synthesis. There has been
significant progress in large scale synthesis of graphene using by chemical and physical routes.
