Figure 3. SEM images of (a) as-grown ZnO nanowires and tetrafluoromethane plasma treated nanowires with bias voltages of (b) 100, (c) 200, and (d) 300 V. The insets show corresponding high magnification SEM images [1]

From

Review of ZnO Nano Devices

H. Murad, M. Abdulrahman, Y. Saleh, Ahmed M. Nahhas

American Journal of Nanomaterials. 2022, 10(1), 9-18 doi:10.12691/ajn-10-1-2