NTU Scientists Develop Energy-Saving 'Liquid Window' (IMAGE) Nanyang Technological University Caption The liquid mixture used to create the smart window is made from micro-hydrogel, water and a stabiliser. Credit NTU Singapore 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.