Polymer Nanofilm Membrane (IMAGE) Imperial College London Caption This is a photo of a free-standing polymer nanofilm membrane (200 nm in thickness) with enhanced microporosity, supported on porous alumina. Credit Qilei Song, Department of Chemical Engineering, Imperial College London. 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.