Its a Trap Molecules (IMAGE) DOE/Argonne National Laboratory Caption Argonne researchers helped identify the process by which holes get trapped in nanoparticles made of zinc oxide, a material of potential interest for solar applications because it absorbs ultraviolet light. Credit Image by Christopher Milne. 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.