Fig. 5

AFM images of brackets coated with ZnO nanoparticles, scanned area 5 µm × 5 µm. a, b, c 2D images showing the ZnO particles, d 3D view showing the peak height of the coating to be 50.2 nm, e histogram reflecting the size distribution (diameter in nm vs.% of particles) showing the average of particles size to be 27.7 nm