Coated Nanoparticles in the Blood Stream (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption Nanoparticles in the blood: The stealth-cap prevents blood components from adhering. The surface has been cross-linked by UV radiation (enlarged image section) and is therefore stable in biological systems. Credit HZDR/Sahneweiss/istockphoto.com/Thomas-Soellner/Molekuul 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.