Cross-Section (IMAGE) Imperial College London Caption This is a cross-section of 20nm thick polymer nanofilm supported on 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.