Cu20 (IMAGE) DOE/Argonne National Laboratory Caption Looking into the hard X-ray nanoprobe synchrotron chamber while measuring a response of an individual cuprous oxide particle to the exposure of carbon dioxide, water and light. Credit Tijana Rajh / Argonne National Laboratory 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.