Dye stack rotating (VIDEO) University of Würzburg This video is under embargo. Please login to access this video. Caption Video showing two nanographenes with bulky substituents that have each attached a PAH to give a quadruple dye stack. Credit Wuerthner group / University of Wuerzburg Usage Restrictions none License Original 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.