Figure 5From: Low-temperature precipitation synthesis of flower-like ZnO with lignin amine and its optical propertiesSEM images of ZnO-10 nanocrystallites at various molar ratios of Zn2+/OH-. (a) 1:2, (b) 1:6 (c) 1:8, and (d) 1:10. The inset in (a) is a high-magnification image.Back to article page