Considering the Effect of Oxygen Group on the Magnetic Properties of Reduced Graphene oxides (RGOs)

Improved magnetic characters of graphene oxides besides its unique biocompatibility make this compound as a theranostics agent could be so practical in the medicine fields. Oxygen functionalities with disturbing the symmetry of graphene sublattices could induce magnetic moments and improve magnetic properties in these structures . While that, vacancies and distortions, created by oxygen release, are also considered as factor disturbing the symmetry of graphene structure and increase its magnetic characters. To consider the effect of oxygen functionalities and deoxygenated defects on the magnetic properties of graphene structure, graphene oxide was synthesized by modified-Hummer method, reduced by distilled water and finally annealed in Argon furnaces. The variation in oxygen bond intensities and level of structural defects was evaluated by Fourier Inferred Transformer and Raman spectroscopy, respectively. And then, their results was matched by vibrating sample magnetometer. The result revealed that the competition between the effect of oxygen groups and deoxygenated defects on the graphene symmetry determinates the magnetic properties of RGOs.