3-D Photographting in Action (video) Vienna University of Technology Loading video... Caption This is a 3-D pattern produced by photografting (180 µm wide). Fluorescent molecules are attached to the hydrogel, resulting in a microscopic 3-D pattern. Credit Vienna University of Technology Usage Restrictions None 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.