Nanoparticle with Cytotoxin (image) University of Copenhagen - Niels Bohr Institute Share Print E-Mail Caption The nanoparticle is approximately 5-600 nanometers in diameter (a nanometer is a millionth of a millimeter). Innermost is the magnetic bead. In the surrounding ring is the biological base material with the encapsulated cytotoxin (yellow dots). The image was obtained at the Paul Scherrer Institute in Switzerland. Credit (Credit: Bordallo and Martins, Niels Bohr Institute) Usage Restrictions (Credit: Bordallo and Martins, Niels Bohr Institute) Share Print E-Mail 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.