This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
New Fabrication Technique Yields Nanoscale UV LEDs . Optical image of the same nanowire in action Most of the light emitted from the device is in the ultraviolet portion of the spectrum but enough visible light is generated to see it glowing Credit NIST Disclaimer Any mention of commercial products within NIST web pages is for information