Raman study of grapheneanostructured oxides for optoelectronic applications

摘要

Recent progress on grapheneanostructured oxide composites as advanced multifunctional nanonet-work is described, highlighting the importance of the interactions between graphene and the nanostruc-tured 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 Fe_3O_4 nanostructures in composites prepared via hydro-thermal 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.