Figure. 2 (IMAGE) Moscow Institute of Physics and Technology Caption Chemical structure of poly(di-n-alkylsiloxanes), or PDAS. Credit Lion_on_helium/MIPT Press Office 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.