Figure 4

SEM images of ZnO particles showing their morphology at three different resolutions. (A–C): Scanning Electron Micrographs of Cassia fistula mediated Zno NPs. (A) SEM of Zno NPs captured at 500× magnification. (B) SEM of Zno NPs captured at 16,000× magnification. (C) SEM of Zno NPs captured at 65,000× magnification. (D–F): Scanning Electron Micrographs of Melia azadarach mediated Zno NPs. (D) SEM of Zno NPs captured at 800× magnification. (E) SEM of Zno NPs captured at 8,000× magnification. (F) SEM of Zno NPs captured at 30,000× magnification. Red dotted circles in (C,F) indicate the NPs circumference.