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Functional groups and dynamic light scattering (DLS) analysis of the prepared FP-CDs. (A) Fourier transform infrared spectroscopy spectrum (FT-IR). (B) X-ray photoelectron spectroscopy survey (XPS), (C) C 1 s, (D) O 1 s, (E) N 1 s high-resolution survey spectrum and (F) The colloid stability of FP-CDs dispersed in water and NaCl measured by DLS.
