Figure 1

Optical analysis of ZnO NPs. (A,B) Color changes indicating formation of ZnO NPs. A) Cassia fistula mediated ZnO NPs. (B) Melia azadarach mediated ZnO NPs. (C,D) UV-visible absorption spectrum confirming presence of ZnO NPs. (A) Cassia fistula mediated ZnO NPs. (B) Melia azadarach mediated ZnO NPs.