Artificial Light-Harvesting Device (IMAGE) University of Groningen Caption Illustration of how an artificial light-harvesting device as simple as a double-walled molecular nanotube (depicted in black and red) is capable to adapt to changing illumination conditions (two light beams) via exciton annihilation (ovals) thereby mimicking the essential functional elements from nature's design toolbox. Credit Dina Maniar Usage Restrictions With credit 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.