Jinhui Yang-Spectroscopy (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Jinhui Yang performing X-ray photoelectron spectroscopy measurements, which are used to understand the chemical properties of surfaces, at the Joint Center for Artificial Photosynthesis. Credit Robert Paz/Caltech Usage Restrictions All rights reserved. Commercial use prohibited. 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.