Gel (1 of 2) (image) Rice University Caption Alternating, nano-sized layers of hydrophilic and hydrophobic molecules self-assemble into a block copolymer called a photonic gel, developed at Rice University and the Massachusetts Institute of Technology. It changes color depending on the amount of water absorbed by the hydrophilic layers, which can be tuned by the solvent used. Credit Thomas Lab/Rice University 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.