Synthesis and characterization of functionalized core–shell γFe2O3–SiO2 nanoparticles

Amino and/or polyethyleneglycol (PEG) functionalized core–shell γFe2O3–SiO2 magnetic nanoparticles were synthesized and characterized. Amino–PEG-functionalized core–shell nanoparticles have calibrated sizes and a good colloidal stability. These bi-functionalized core–shell nanoparticles are potentially useful as biocompatible particles for magnetically targeted chemotherapy.