Figure 1. Hydrogel coating methods. (IMAGE) Science China Press Caption (a) The surface bridge method, (b) & (c) the surface initiation method, and (d) the hydrogel paint method. Credit @Science China Press Usage Restrictions Use with credits 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.