Fig. 1. Physiochemical characterization of iron(iii) chelated polymeric NPs. (A) Transmission Emission Micrograph (TEM) of NPs, (B) EDS spectroscopy showing the Fe content in the NPs, (C) hydrodynamic size of NPs as prepared and after 20 day incubation, and (D) zeta potential of PLGA NPs and Fe–PLGA NPs dispersed in PBS.