Observing Surface Chemistry Diagram (image) DOE/SLAC National Accelerator Laboratory Share Print E-Mail Caption This illustration shows the steps in observing a chemical reaction, where molecules of carbon dioxide are excited and begin to break away from the surface of a catalyst – a crystal composed of ruthenium. An optical laser pulse (shown in blue) initiates the chemical reaction and a nearly instantaneous X-ray laser pulse (green) probes its early stages. Credit Hirohito Ogasawara / SLAC National Accelerator Laboratory Usage Restrictions Please provide credit Share Print E-Mail 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.