Dual metal ion (Fe3+ and As3+) sensing and cell bioimaging using fluorescent carbon quantum dots synthesised from Cynodon dactylon

Green synthesis of yeast cell wall-derived carbon quantum dots with multiple biological activities

“…Moreover, the presence of Fe³⁺ holds the potential to disrupt the fluorescence emission of P-CQDs through one of two mechanisms: either via inner filter effects involving reabsorption of photons or by photo-induced electron transfer processes that alter the excited state electronic configuration and cause fluorescence suppression through non-radiative pathways. Further binding studies are required to elucidate the quenching mechanism and enhance P-CQDs as fluorescent probes for Fe3+ detection [ 50 , 51 ]. When phosphorus is doped onto CQDs, it introduces additional functional groups on the surface of the CQDs that can interact with Fe³⁺ ions more effectively [ 31 ].…”

Peanut shell carbon quantum dots modified with citric acid: amplifying visual detection of fluorescence sensitivity for Cu2+

“…For the past few years, carbon quantum dots have attracted great attention due to their unique properties, such as stable photoluminescence, 9 low toxicity, 10 good biocompatibility, 11 and high solubility. 12 Carbon quantum dots have been greatly used in various applications, such as chemical sensing, 13 bioimaging, 14 biosensing, 15 and photocatalysis. 16 Different preparation methods have used different chemicals as the source of carbon or the surface passivation reagent.…”