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Characterization of coprecipitation synthesized Fe3O4 nanoparticles: (a) Representative TEM image of Fe3O4 nanoparticles showing their morphology and size; (b) Size distribution of Fe3O4 nanoparticles determined by dynamic light scattering at room temperature; (c) Zeta potential of Fe3O4 nanoparticles measured at room temperature; and (d) Vibrating sample magnetometer measurement showing the magnetic property of the nanoparticles.
