polymer pen arrays (IMAGE) Advanced Science Research Center, GC/CUNY Caption Three views of polymer pen arrays used to study mechanochemical reactions. The pointy part of each microscopic tip can "push" on a molecule, triggering a chemical reaction. Credit Daniel Valles and Yerzhan Zholdassov/Advanced Science Research Center at the CUNY Graduate Center Usage Restrictions All rights reserved 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.