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Characterization of citric acid-coated CeONP. (A) Schematic depiction of CeONP synthesis. (B) Micrograph from TEM, (C) core and hydrodynamic diameters and surface charge, (D) EDX spectrum, (E) XRD pattern (including cerium(IV) oxide peaks as the reference), (F) XPS analysis of CeONP. (G) FTIR spectra of citric acid and CeONP.
