Synthesis of double carbon dots co-doped mesoporous Al2O3 for ratiometric fluorescent determination of oxygen

Carbon dot composites for bioapplications: a review

“…5A). 140,141 In another study, the MA–CD composites, which were prepared through the same method, demonstrated a much higher fluorescence QY (46.69%) and long-term stability, while the QY of CDs was ∼33% and the QY of MA was ∼2.11% (Fig. 5B).…”

“…For instance, in Yan and co-workers’ study, glyoxylic acid-modified CDs (GA-CDs) were used as a FRET ratiometric fluorescent probe for the detection of Cu 2+ in aqueous solution. 388 Similarly, Chen et al also applied cyclam-functionalized CDs as a FRET nanoprobe for the detection of Cu 2+ and S. 2–389 In addition to the above examples, the detection of other important metal ions such as Ag + , Cu 2+ , Cr 6+ , and Pb 2+ has also been successfully realized with CD composite-based sensing platforms. 390–401…”

Recent development in carbon dot-based gas sensors

“…But the CDs synthesized lack purity and homogeneity and their QY varies from batch to batch [11,69]. Since QY of the CDs is not an important parameter for sensors, any source of raw material such as yogurt [39], jackfruit [76], bagasse [72], bee pollen [24], eggs [6,24], fennel seeds [11], ginger [25], roasted gram peel [49], saffron [26], banana peel [57,77], rice husk [78], black sesame [69], radish [45], etc can be used to synthesize CDs. Recently, several attempts have been made to produce CQDs in large scales with high yield using simple precursors [24,36,40].…”

Enhanced Fluorescence and Environmental Stability of Red-Emissive Carbon Dots via Chemical Bonding with Cellulose Films

“… 14 Also, inorganic minerals of mesoporous aluminas (MAs) were applied as a substrate to combine with carbon dots. 15 Two kinds of carbon dots were restricted within the substrate pores after stirring with MAs, and emissions originating from both blue and red CDs were retained. The hybrid material was applied as an oxygen sensor due to the monotonic quenching of red emission when it encountered oxygen, which also indicated that the carbon dots were unstable in the matrix with weak physical force.…”