URL: https://www.researchgate.net/profile/Hassan-Karami-2/publication/301352197/figure/fig8/AS:368582933401607@1464888427770/The-images-of-ZnO-examples-for-SEM-that-synthesized-in-various-times-of-the-pulse-025.png
URL2: https://www.researchgate.net/figure/The-images-of-ZnO-examples-for-SEM-that-synthesized-in-various-times-of-the-pulse-025_fig8_301352197
