Biocompatible Prussian blue nanoparticles: Preparation, stability, cytotoxicity, and potential use as an MRI contrast agent

A simple synthetic procedure for preparing biocompatible superparamagnetic Prussian blue (PB) nanoparticles is reported. The stability, cytotoxicity and ability for PB nanoparticles to penetrate cells are investigated. The potential of using PB nanoparticles as the T1-weighted MRI contrast agent is demonstrated.