“…Nanocrystals with enhanced magnetic properties have been actively pursued for potential biomedical applications such as drug delivery [ 1 , 2 ], hyperthermia therapy [ 3 ], magnetic resonance imaging (MRI) contrast enhancement [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ], as well as nanotechnology applications such as catalysis and permanent magnets [ 13 , 14 ]. In order to use these nanoparticles for in vivo or in vitro biomedical applications such as MRI contrast enhancement, the combined properties of high magnetic saturation, stability, biocompatibility, and interactive functions at the surface are essentially required.…”