Crayfish shells-derived carbon dots as a fluorescence sensor for the selective detection of 4-nitrophenol

Antioxidant radical scavenging capacity and total carotenoid content of narrow-clawed crayfish (Pontastacus leptodactylus, Eschscholtz, 1823) in Atikhisar Reservoir (Çanakkale, Türkiye)

“…Recently, carbon dots, as a new class of zero-dimensional carbon nanomaterials, have been widely used as fluorescent probes in the field of contaminant analysis due to their tunable photoluminescence, excellent solubility, low toxicity, chemical inertness, and good biocompatibility. Chen et al (2023) used crayfish shells as precursors to prepare a new type of carbon dots and the proposed sensor was successfully applied for the detection of 4-NP in fresh crayfish meat and aquatic water samples. He & Du (2023) detected tartrazine with fluorescence sensor from crayfish shell carbon quantum dots.…”

An overview on animal/human biomass-derived carbon dots for optical sensing and bioimaging applications

“…172 This unique phenomenon was explained by the generation of cOH radicals, which effectively destroyed the surface emissive centers in N-CDs (responsible for their emission) rather than the nuclear states (mainly cause absorption). The recently reported doped CDs from craysh shell, 186,187 milk powder, 200 sh scales, 231 and sh scale collagen peptides 234 also showed excellent photostability. The photo-stability of animal/human biomassderived CDs was also demonstrated for different period of times in air 134,150,172,174,183,247 and even aer storage for many days/months/year under ambient conditions.…”

“…Marine crustaceans such as shrimp, crab, prawn, and craysh are highly consumed seafood worldwide, and also recognized as natural sources for the synthesis of animal biomass-derived CDs. Heteroatom-doped CDs were successfully synthesized from shrimp egg, 173 prawn shells, [174][175][176] dried shrimp, 177 crab shells, [178][179][180][181] shrimp shells, 182-184 craysh shells, [185][186][187] and mussel seafood 188 using different synthetic protocols (Table 1). The applicability of the ultrasonication method in the synthesis of N-CDs from crab shells is shown in Fig.…”

“…Moreover, a linear dependence was also observed in some animal-derived doped CDs, 127,139,180 which is crucial for pH sensor application. The pH-dependent PL features of doped CDs derived from various animal/human sources such as egg white, 133 Bombyx mori silk, 138 cocoon silk, 139 spider silk, 142 roasted duck, 156 bee pollen, 172 prawn shell, 174 craysh shell, [185][186][187] mussel seafood, 188 cow milk, 191,199 hen feathers, 207 pig skin collagen, 211 pigeon manure, 221 sh scales, 223,227 carp roe, 233 human hair, 239,240 human urine, 245 and human ngernails 247 were oen explained by the protonation-deprotonation of the functional groups present on their surface. The protonationdeprotonation mechanism of doped CDs under different pH conditions were also endorsed by the changes in their zeta potential.…”