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. 2022 Aug 31;20:393. doi: 10.1186/s12951-022-01595-3

Fig. 2.

Fig. 2

Surface functionalization of core magnetic nanoparticles. A Representative coating types used in iron-oxide core MNP functionalization (IONPs). Grey circles represent the core of IONPs. (Reproduced with permission from Arias et al. [35]). B Schematic for PEG-based MNP surface functionalization. Iron (Ferric hydroxide) based core was first surface coated with oleic acid (OA) and then functionalized with poly ethylene glycol (PEG) containing the N-hydroxysuccinimide (NHS) functional group for increased stability and drug binding. (Reproduced with permission from Yallapu et al. [36])