Fig. 4From: ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room TemperatureHigh-resolution C1s XPS spectra of a GO and b ZnO/rGO-1 films. The XPS analysis further confirm the presence of rGO in ZnO/rGO thin film after thermal reduction processBack to article page