Figure 3From: Low-temperature precipitation synthesis of flower-like ZnO with lignin amine and its optical propertiesSEM images of the ZnO nanocrystallites. (a) ZnO-0, (b) ZnO-5, (c) ZnO-10, and (d) ZnO-15. The insets in (a) and (c) are high-magnification images.Back to article page