3D-printed QR code (IMAGE) ARC Centre of Excellence in Exciton Science Caption A composite image displaying a 3D-printed QR code with a pattern that is deciphered under exposure to ultraviolet light. Credit ETH Zurich Usage Restrictions For use with this story only License Original 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.