Ultra-fast microwave-assisted synthesis of photoluminescent carbon dots with an ultra-high quantum yield for H2O2 detection

Cancer Cell Targeting Via Selective Transferrin Receptor Labeling Using Protein-Derived Carbon Dots

“…50,51 The band gap between valence band and conduction band of the particle increases with decreasing particle size, resulting in enhanced quantum yield and fluorescent emission due to the band gap transition in the ultraviolet region. 52 It can be seen in Figure 4A that the fluorescence emission of the transferrin CDs is 413 nm under 343 nm UV excitation. This indicates successful formation of luminescent CDs from the transferrin protein.…”

“…56 Nitrogen is of similar radius size to that of carbon and can be easily integrated within the carbon structure forming new surface state energy levels lowering the band gap energy often resulting in red-shifted emission wavelengths and improved quantum yield. 52 Formamide and ethylenediamine were the organic solvents used in conjunction with the transferrin protein. Both solvents are rich in nitrogen to aid in the incorporation of nitrogen into the carbon dot during particle nucleation and subsequent carbonization.…”

Carbon dots with high quantum yields used for Fe3+ detection, information encryption and anti-counterfeiting

“…[40][41][42] Several groups fabricated sulfur or nitrogen doped carbon dots as fluorescent probes via a hydrothermal method, which requires a long reaction time (6 h, 8 h, 9 h or even 12 h). [43][44][45][46] In this paper, we used water as a green solvent to synthesize B-CDs with strong blue fluorescence using citric acid and o-phenylenediamine as raw materials via a microwave assisted hydrothermal method. The B-CDs were prepared in 30 min and achieved the selective detection of Fe 3+ .…”

“…40–42 Several groups fabricated sulfur or nitrogen doped carbon dots as fluorescent probes via a hydrothermal method, which requires a long reaction time (6 h, 8 h, 9 h or even 12 h). 43–46 Zhao et al 46 used a household microwave oven to prepare carbon dots in ethylene glycol from citric acid and o-phenylenediamine which reduces the reaction time to 3.5 min. The prepared CDs were used to detect H 2 O 2 .…”

“…Zhao et al46 used a household microwave oven to prepare carbon dots in ethylene glycol from citric acid and -phenylenediamine which reduces the reaction time to 3.5 min. The prepared CDs were used to detect H 2 O 2 .…”