New ultrasmall iron-oxide nanoparticles with high magnetisation as   potential T1-MRI contrast agents for Molecular Imaging
  Here we report on the synthesis of very small gamma-Fe2O3 nanoparticles (5 nm) presenting very narrow particle size distribution and exceptionally high saturation magnetisation. The synthesis has been carried out in an organic medium with subsequent transfer to an aqueous solution at physiological pH. The structural and magnetic properties were kept unaltered after the solvent exchange. NMR relaxometric measurements show the potential of these particles as specific reporters for magnetic resonance molecular imaging. 
Elena Taboada (1), Elisenda Rodriguez (1 and 2), Anna Roig (1), Judit   Oro (1), Alain Roch (2) and Robert N. Muller (2) ((1...