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. 2021 Mar 12;22(1):218–233. doi: 10.1080/14686996.2021.1883406

Figure 2.

Figure 2.

XPS spectra of the coated nanospheres (CuO-NPs@H-PLGA/PDA/PEG NS). (a) Spectrum in the N region, (b) Spectrum in the S region, (c) Spectrum in the C region and (d) Spectrum in the Cu region