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. 2020 Feb 19;15:1187–1203. doi: 10.2147/IJN.S237089

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© 2020 Bai et al.

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The physicochemical properties of CS-SeNPs. (A) Transmission electron microscopy (TEM) image of CS-SeNPs and their appearance (inset). (B) Typical energy-dispersive X-ray spectroscopy (EDS) spectra of CS-SeNPs (found at Area I, Panel (A) and their elemental composition (inset). (C) The absorbance (525 nm) of potassium permanganate (KMnO₄) solution when coming across with UF filtrate and their appearance (inset). (D) The size distribution of CS-SeNPs measured basing on TEM results, and the influence of UF on the size of these nanoparticles (inset). (E) Zeta-potentials of bare SeNPs and CS-SeNPs (before or after 6 rounds of UF). (F) SEM image of SeNPs-CM and their size distribution (inset). (G) FTIR spectra of bare SeNPs, BCM and SeNPs-M. (H) Se 3d XPS patterns of Se (IV) (selenite or selenium dioxide), Se (0) (bare SeNPs or crystal Se) and SeNPs-CM, obtained with or without argon etching.