Fig. 3From: Synthesis of Nitrogen and Sulfur Co-doped Carbon Dots from Garlic for Selective Detection of Fe3+ Photoluminescence properties of CDs. a UV-vis absorption of CDs (inset was the photo under UV light). b PL emission spectra of CDs under different excitation wavelength from 300 to 440 nm. c PL QY of CDs prepared by adding different volumes of EA. d PL emission spectra of CDs with 1 mL EA added (CD-1) under different excitation wavelength from 300 to 440 nmBack to article page