Figure 3
From: Blue and green luminescent carbon nanodots from controllable fuel-rich flame reactors
UV-Visible absorption, excitation and emission fluorescence spectra of blue CDs (a) (λexc = 315 nm and λem = 440 nm), and green CDs (b) (λexc = 340 nm and λem = 505 nm), extracted from carbon particulate matter sampled at 6 mm of the HSF reactor. The photos of blue and green fluorescent sample solutions and the optical band gap values measured on the UV-Visible spectra are inserted in the respective figures.
