Research Article

Biosynthesis of Zinc Oxide Nanoparticles Using Aqueous Piper betle Leaf Extract and Its Application in Surgical Sutures

Figure 10

Effectiveness of zinc ion concentration on ZnO NP formation.
(a) ZnO NPs 1: transparent solution
(b) ZnO NPs 2: precipitate starts to be observed
(c) ZnO NPs 3: precipitate was observed clearly