DualGradientParticle_16x9_500KB.jpg (IMAGE) DOE/Argonne National Laboratory Caption This image, created by a scanning electron microscope, shows the dual-gradient cathode particles fabricated by the Argonne team. Credit (Image by Argonne National Laboratory.) Usage Restrictions None License Original 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.