Gold/Copper Nanoparticles (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This TEM shows gold-copper bimetallic nanoparticles used as catalysts for the reduction of carbon dioxide, a key reaction for artificial photosynthesis. Credit Image courtesy of Peidong Yang group, Berkeley Lab 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.