Smart Window Illustration (IMAGE) University of Texas at Austin Caption This is a linear structural model of chemically condensed niobium oxide determined by combined experimental and theoretical approach (green balls represent Nb while red balls represent O). Credit Cockrell School of Engineering 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.