Monodispersed Fe3O4-Dextran nano-particles were prepared by chemical co-deposition with average diameter of 16 nm, and a core of diameter of 5.5 nm for Fe3O4 with a shell of thickness 5 mn for Dextran. The results of magnetic property determination show that: they have a good magnetization of 76 emu·g-1 which is increased by a factor of 49%. As compared with 51 emu·g-1 for the material obtained without the addition of coordination compound in the processing.
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