Precise Polyrotaxane Synthesizer (VIDEO) Northwestern University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Sir Fraser Stoddart's laboratory has developed the most precise way to build polyrotaxanes, using an artificial molecular pump that installs rings onto a polymer string. Credit Northwestern University 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.