Figure 4.
(a) Nitrogen (N2)-adsorption/desorption isotherms of Fe3O4 nanoparticles, and (b) Fe3O4/HAp nanocomposite. Inset Figure (c,d) shows the pore-size distribution of the Fe3O4 nanoparticles and Fe3O4/HAp nanocomposite, respectively.
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