Reduction of graphene oxide monolayers transferred on Si and Ti substrates by LB technique

Graphene oxide sheets were transferred on Si and Ti substrates by Langmuir-Blodgett technique and were reduced by hydrazine vapor treatment followed by annealing in vacuum/inert atmosphere. A comparison of Raman spectra of reduced graphene oxide on Si and Ti shows that the reduction process is more effective in the later case and results in the formation of RGO with higher graphitic carbon content, exhibiting spectral features closer to those of graphene monolayers.