Spectroscopic studies of large sheets of graphene oxide and reduced graphene oxide monolayers prepared by Langmuir-Blodgett technique

► Graphene oxide (GO) monolayers were deoxygenated to form reduced GO (RGO). ► GO monolayers are 20-40 μm in size, which does not change during reduction. ► Reduction process does not affect the morphological stability of monolayers. ► RGO monolayers show substantial decrease in non-graphitic carbon content. ► Raman studies indicate presence of order in both GO and RGO monolayers.