Fig. 4.
FESEM micrograph of a synthesized Fe3O4 NPs, b CS-Fe3O4 NCs. All the scale bars are 200 nm. EDS spectrum of c Fe3O4 NPs and d CS-Fe3O4 NCs. Bright-field TEM image and size distribution of f, h Fe3O4 NPs, g, i CS-Fe3O4 NCs and e pure chitosan
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