Bacteria and nanoparticle catalysts (IMAGE) University of Rochester Caption The system created by University of Rochester researchers mimics photosynthesis, utilizing semiconductor nanocrystals for light absorbers and catalysts and bacteria to donate electrons to the system. The system is submerged in water and driven by light. Bacteria (the large rods) interact with nanoparticle catalysts (the small orange dots) to make hydrogen gas (H2, the bubbles). Credit University of Rochester illustration / Michael Osadciw 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.