(IMAGE) Technical University of Munich (TUM) Caption This photo shows Sarah Wieghold (front) and Juan Li at the scanning tunneling microscope where the photoresponsive monolayers were characterized. Credit Andreas Battenberg / TUM 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.