Highly sensitive gas sensor using hierarchically self-assembled thin films of graphene oxide and gold nanoparticles

In this study, we fabricated hierarchically self-assembled thin films composed of graphene oxide (GO) sheets and gold nanoparticles (Au NPs) using the Langmuir–Blodgett (LB) and Langmuir–Schaefer (LS) techniques and investigated their gas-sensing performance. First, a thermally oxidized silicon wafer (Si/SiO2) was hydrophobized by depositing the LB films of cadmium arachidate. Thin films of ligand-capped Au NPs and GO sheets of the appropriate...