Characterization of graphene nanoplatelets-Si3N4 composites by Raman spectroscopy

Raman spectroscopy is a very useful tool to study composites containing carbon phases and in particular graphene based structures. For a Si3N4 composite containing 3 wt.% of graphene nanoplateletes (GNPs) fabricated by spark plasma sintering (SPS), the main characteristics observed in the Raman spectra and the images obtained by mapping specific graphene peaks are presented. Raman images evidence differences in the relative intensity of typical...