Fig. 4: Absorption and emission spectra of FA-CDs in water and DMSO solutions | Light: Science & Applications

Fig. 4: Absorption and emission spectra of FA-CDs in water and DMSO solutions

From: One step synthesis of efficient red emissive carbon dots and their bovine serum albumin composites with enhanced multi-photon fluorescence for in vivo bioimaging

Fig. 4

a Absorption spectra (solid line) and FL spectra (dashed line) of FA-CDs in water and DMSO under 589 nm excitation. Temperature-dependent absorption spectra of FA-CDs in b water and c DMSO, respectively. d Luminescence decays of FA-CDs in water, FA-CDs@BSA (mass ratio of FA-CDs and BSA: 1:100) in water, and FA-CDs in DMSO monitored at 640 nm under 510 nm excitation (IRF = instrument response function). Temperature-dependent FL spectra of FA-CDs in e water and f DMSO, measured at 589 nm excitation. The concentration of FA-CDs is 0.01 mg mL−1. g Ratios of the maximum intensities of the absorption (Iabs, black line) and FL (Iem, red line) of FA-CDs in water (square) and DMSO (circular) at different temperatures to the maximum intensities of that at 20 °C. h 1H NMR spectra of FA-CDs in DMSO-d6 at 25 °C and 60 °C

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