Zinc Ferrite Nanoparticles (IMAGE) University at Buffalo Caption A transmission electron microscope image of zinc ferrite nanoparticles with an average diameter of 22 nanometers. This type of nanoparticle possesses high heating performance at very low magnetic fields suitable for clinical use, researchers say. Credit Xiang Yu Usage Restrictions This image may only be used with news reports discussing the research in the associated press release. 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.