Team (IMAGE) Virginia Tech Caption Lou Madsen (left) is an associate professor in the Department of Chemistry and led an international interdisciplinary collaboration in the discovery of the double helix structure of a polymer called PBDT. Ying Wang (right) is a former doctoral student from Madsen's group who served as first author on the paper. Credit Virginia Tech 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.