Fig. 2From: ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room TemperatureRepresentative FESEM images of a rGO and b ZnO/rGO-1 films. The surface morphology features of ZnO/rGO bilayer film demonstrates obvious fluctuant transparent rGO nanosheets with dispersed ZnO nanoparticles or their aggregationBack to article page