A Motorized Metal-Organic Framework (IMAGE) University of Groningen Caption The building blocks of the motorized metal-organic framework 'cages' and the crystal containing a large number of 'cages'. Credit University of Groningen Usage Restrictions With 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.