Raman study of graphene/nanostructured oxides for optoelectronic applications

• ZnO and Fe3O4/Graphene nanorods composites were prepared via simple chemical method.
• Electron microscopes images show the graphene sheets with ZnO and Fe3O4 nanorods.
• Results reveal the origins of emissions from ZnO/G and magnons from Fe3O4/G.
• Raman scattering shows a strong interaction of graphene with the nano-oxides.

Recent progress on graphene/nanostructured oxide composites as advanced multifunctional nanonetwork is described, highlighting the importance of the interactions between graphene and the nanostructured materials and the beneficial role of graphene in their based composites for specific applications. In this work, we studied the interaction between graphene sheets and different nanostructured oxides for optoelectronic applications, including ZnO and Fe3O4 nanostructures in composites prepared via hydrothermal methods. Our results, obtained by a Raman spectroscopy with an excitation wavelength of 785 nm, show strong interactions in emerging from magnons generation, enhancing new light emission, sheets exfoliation and functionalization. These results were of particular importance in terms of understanding and knowing the origins of the emitted lights and the generated magnons as well as the structural properties of the elaborated nanocomposites. Scanning electron microscopy (SEM) and Transmission electron microscopy) TEM results were used to support and confirm Raman spectra based interpretations.