Research Article

Preparation of a Novel Thiol Surface Modifier and Fe3O4 Drug Loading Agent as well as Releasing under pH-Sensitivity

Figure 3

XRD spectra of products. (a) Fe3O4. (b) Fe3O4-TIPTS. (c) Fe3O4-TIPTS -g-(PEI-co-PEG). (d) Loading DOX onto Fe3O4-TIPTS-g-(PEI-co-PEG).