Effect of Synthesis Temperature, Nucleation Time, and Postsynthesis Heat Treatment of ZnO Nanoparticles and Its Sensing Properties

Figure 4

AFM images of ZnO NPs with nucleation time of (a) 0 min, (b) 2 min, and (c) 8 min. The results show that overall particle size and size distribution increase with increase in nucleation time.

(a)

(b)

(c)