Hydrogel Activation (VIDEO) Georgia Institute of Technology This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption A hydrogel with a cross-linked fluorescent group that had been caged with a molecular 'hat' was irradiated with UV light to remove the caging group and activate fluorescence. The patterning is revealed by irradiating specific areas of the gel in sequence to create a Georgia Tech logo. Credit Credit: García Laboratory at Georgia Tech Usage Restrictions None 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.