Surface Molecules on Au133 (IMAGE) Carnegie Mellon University Caption The surface molecules that protect the nanoparticle's gold core include carbon tails that self-assemble into fourfold swirls reminiscent of the swirl of our galaxy. Credit Carnegie Mellon University 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.