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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Surface States Induced Photoluminescence Enhancement of Nitrogen-Doped Carbon Dots Via Post-Treatments

Fig. 2

a Normalized PL spectra of NCDs in six solvents, λex = 400 nm. b Digital photograph of NCDs in six solvents under an UV lamp. c Absorption spectra of NCDs in six solvents. Relationship between the spectral parameters and ET (30): d Stokes shifts and e lifetimes. f Schematic illustration of the interaction between surface functional groups and solvents. Solvents used are as follows. 1: toluene, 2: acetone, 3: DMSO, 4: ethanol, 5: EG, 6: water

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