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. 2019 Feb 27;9(3):209–216. doi: 10.1016/j.jpha.2019.02.003

Fig. 3.

Fig. 3

(A) FTIR spectrum, (B) XRD pattern, (C) TEM image and (D) the particle size distribution of CDs. (E) Emission spectra of the CDs solution (32 mg/L) in pH 6.9 phosphate buffer recorded at different excitation wavelengths, from 290 to 400 nm with 10 nm increments. (F) UV–Vis absorption, excitation and emission spectra and photographs (inset) of the same CDs solution.