Graphene oxide based hybrid nanostructures with ZnO thin films and nanorods

Graphene oxide (GO) monolayer sheets were transferred on to sputtered ZnO films and chemically grown ZnO nanorods by Langmuir-Blodgett technique. SEM images show that the GO sheets are well defined and uniformly distributed over both surfaces, namely, ZnO film and ZnO nanorods. Raman studies show that the ZnO film has a higher reducing effect on GO monolayers compared to ZnO nanorods, with the most effective reduction at intermediate temperatures in the range of 400 - 600 °C, and a degradation of GO sheets on both structures, after heat treatment at 800 °C. Photoluminescence spectra of heat treated GO/ZnO film and GO/ZnO nanorods show characteristic near-band-edge emission of ZnO, which is not significantly affected by the presence of RGO sheets.