Water Soluble Carbon Quantum Dots 515±10 nm

Water Soluble Carbon Quantum Dots (515±10 nm emission) are high-purity, carbon-based nanostructures designed for exceptional aqueous stability and intense photoluminescence in the green spectral range. These CQDs are distinguished by their ultra-small particle size and a surface abundant in carboxyl and hydroxyl functional groups, facilitating effortless conjugation with complex biomolecules such as enzymes, ligands, and genetic material. Unlike inorganic semiconductor dots, these carbon-derived fluorophores are fundamentally non-toxic and eco-compatible, ensuring minimal interference with live cell viability or environmental health. With a high extinction coefficient and a robust resistance to photobleaching, these 515 nm CQDs provide a reliable, sharp signal for high-resolution optical applications, serving as a versatile bridge between organic chemistry and advanced nanobiotechnology.

Applications

• Molecular Bioimaging: Functions as a high-contrast fluorescent probe for subcellular localization and long-term tracking of live organisms with negligible cytotoxicity.
• Rapid Biosensing: Acts as a sensitive signal transducer in ratiometric assays for the detection of metabolites, proteins, and tumor markers via fluorescence intensity modulation.
• Environmental Heavy Metal Detection: Utilized for the "on-off-on" fluorescent sensing of trace hazardous metal ions (Hg2+, Fe3+, As3+) in industrial and domestic water supplies.
• Targeted Drug Delivery & Theranostics: Serves as a multifunctional nanovehicle for the simultaneous delivery of therapeutics and real-time imaging of drug distribution within targeted tissues.
• Heterogeneous Photocatalysis: Exploits its efficient photo-induced electron transfer capabilities to catalyze the degradation of organic dyes and pollutants under visible light.
• Food Safety Analytics: Employed in the detection of pesticide residues, food additives, and pathogens through highly selective fluorescent quenching mechanisms.