https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/3322868Edit ImageSaveSaveEditCropCustom TextA colorized SEM image of a black oxide nano-flower. Original public domain image from FlickrMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1109 px | 300 dpiLarge JPEG 1920 x 1774 px | 300 dpiFree DownloadA colorized SEM image of a black oxide nano-flower. Original public domain image from FlickrMore