Reaction Progress (IMAGE) DOE/Brookhaven National Laboratory Caption This is a series of scanning transmission electron microscopy (STEM) images of platinum nanoparticles, tracking their changes under different atmospheric pressure reaction conditions. Credit Brookhaven National Laboratory Usage Restrictions with credit to Brookhaven National Laboratory 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.