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Figure Caption
Fig. 1 (A) Schematic illustration of the preparation of F-NCDs. (B) TEM image of F-NCDs. (C) Diameter distribution of F-NCDs. (D) UV–vis absorption, excitation, and emission spectra of F-NCDs. (E) FTIR spectrum of F-NCDs. (F) XPS full spectrum, (G) high-resolution C 1s, (H) N 1s, (I) O 1s, and (J) F 1s XPS spectrum of F-NCDs.
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