Selective and sensitive detection of tartrazine in beverages by sulfur quantum dots with high fluorescence quantum yield

Green and facile synthesis of silicon-doped carbon dots and their use in detection of Hg2+ and visualization of latent fingerprints

“…Evident spectral overlap occurred in the absorption band of the Hg 2+ and the excitation spectrum of the Si-CDs, indicating that the fluorescence quenching of the Si-CDs by Hg 2+ may originate from the internal filtering effect (IFE). 71 However, the remarkable reduction in the lifetime demonstrated that the IFE mechanism can be excluded in the process. 72 TEM characterization was performed to further reveal the mechanism.…”

Research Progress in the Synthesis of Carbon Dots and Their Application in Food Analysis

“…The S-CQDs possessed excellent fluorescence properties, with a QY of 20.19%, and a selective reaction with lemon yellow, resulting in a fluorescence-quenching effect with a detection limit of 0.45 μmol/L. Similarly, Peng et al [ 76 ] synthesized S-CDs protected by terephthalic acid as a stabilizer with a QY of 85.99% and LOD of 39 nmol/L, which could be applied to detect citric yellow in beverages, as shown in Figure 5 . Xu et al [ 77 ] used 3,4,9,10-tetracarboxylic dianhydride (PTD) as a carbon source to synthesize CDs that could be used to detect sunset yellow FCF.…”