William Dichtel - Modified COF (IMAGE) Northwestern University Caption A conductive polymer (green) formed inside the small holes of a hexagonal framework (red and blue) work together to store electrical energy rapidly and efficiently. Credit William Dichtel, Northwestern University Usage Restrictions Credit must be given. 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.