One‐Pot Reaction to Synthesize Biocompatible Magnetite Nanoparticles

Biocompatible magnetite nanocrystals (see Figure) are prepared by thermal decomposition of ferric triacetylacetonate in 2-pyrrolidone in the presence of monocarboxyl-terminated poly(ethylene glycol) (MPEG-COOH). The results reveal that MPEG is covalently bound to the nanocrystal surface by COOH groups. Magnetic resonance imaging (MRI) experiments indicate that the coated nanocrystals are potential MRI contrast agents due to their excellent water solubility and biocompatibility.