Fig. 5From: Gas-Sensing Devices Based on Zn-Doped NiO Two-Dimensional Grainy Films with Fast Response and Recovery for Ammonia Molecule DetectionSEM and EDS analysis of NiO films doped with different concentrations of Zn. A1–C1 SEM images of NiO films with 0, 3, and 6 mol % of Zn-doping concentration. A2–C2 EDS analysis from a series of locations on films was labeled with point 1, point 2, and point 3, and the quantitative element distribution in atomic percentage is tabulatedBack to article page