Metal-organic Framework (IMAGE) KU Leuven Caption The image represents the 3-D structure of the metal-organic framework used in this study: a nanoporous thin film that consists of both organic molecules and metal ions. The nanopores are represented as yellow balls. The internal surface of an MOF, formed by all these pores, varies in size from 1,000 to 5,000 m2 per gram of material. Credit KU Leuven - Ivo Stassen Usage Restrictions Use with appropriate caption and credit 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.