Light (IMAGE) Paul Scherrer Institute Caption CuPCP gives off an intense green glow not only when current is applied, but also under UV light. Credit University of Bremen/Matthias Vogt Usage Restrictions All media, such as photos, graphics and videos may only be used in the editorial context of these contents, naming the author. Archiving of this media is not permitted. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.