Figure 3.
Transmission Electron Microscopy images for magnetic samples loaded with the fluorene derivatives: (a,b) Fe3O4@citrate, (c,d) Fe3O4@ citrate@1a, (e,f) Fe3O4@ citrate@1b, (g,h) Fe3O4@ citrate@1c, (i,j) Fe3O4@ citrate@1d.
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