Layer Production (IMAGE) Heinrich-Heine University Duesseldorf Caption Producing the layer structure, (from left): First a solution containing the spherical hydrogel cores with the gold particles included is carefully applied to a water surface. This rapidly forms an ultra-thin, shimmering layer that can subsequently be lifted off using a glass substrate. Credit HHU / Christoph Kawan 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.