ABSTRACT
The discovery of graphene has opened up opportunities for scientists and engineers to design new materials with special properties for different applications so that it can be considered as a “magic discovery” of the center. It is believed that most of applications still have not been dened due to the lack of complete understanding of the material properties of this honeycomb two-dimensional structure. Following this discussion, identifying the chemistry of the graphene surface can be considered as a chief issue in the eld of graphene investigation. Actually, interactions of graphene with the surrounded media, which are governed by the surface atoms, play an important role in the reinforcing effect of this nanoparticle in different matrixes. As well, graphene sheets with a suf-ciently large aspect ratio and high surface energy tend to restack and crumple which is totally undesirable due to the dramatic decrease in surface area. Manipulation of graphene surface properties with chemical modication is the way which has been considered nowadays in different laboratories. Surface modication of graphene in order to obtain a stable dispersion of graphene sheets would be virtually important since wrinkling and even globular structures, “lumps” depend on the interactions and the surface energy reduction. Until now, the wide range of methods and also different molecules including small and macromolecules have been examined. In this chapter, an attempt is made to review the recent progress in the applied methods for chemical modication of graphene and its effect on the topological and electrical properties of graphene.
