3D PGNP (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption STEM tomography image of a 3D-grown 100-200-nanometer crystalline disc grown from 3D gold-polystyrene polymer-grafted nanoparticles. Credit Berkeley Lab 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.