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Water Soluble Cadmium Selenide Quantum Dots (CdSe/ZnS) 450 nm

Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) core–shell quantum dots, precisely engineered for a 450 nm emission, deliver a high-performance solution for blue-region optical applications. The CdSe core is epitaxially passivated with a ZnS shell, effectively reducing surface defects and suppressing non-radiative recombination, which results in strong photoluminescence efficiency and enhanced photostability. Exhibiting a narrow FWHM (<25 nm) and robust quantum yields (>50% with MPA/CA/GSH ligands, >40% with PEG-COOH/PEG-NH2 ligands), these nanocrystals provide bright, well-defined signals with minimal spectral overlap. Their water-soluble ligand chemistry ensures excellent dispersibility in aqueous systems, making them highly suitable for biosensing, fluorescence imaging, and integration into advanced photonic devices. The combination of optical precision, environmental compatibility, and versatile surface functionalization positions these 450 nm dots as a reliable material for both research and industrial applications.

Technical Properties

Configurable Parameters

Applications

• Multiplexed Bioimaging: Serves as a stable fluorescent probe in aqueous biological environments, enabling multi-color imaging of cellular and tissue samples with high sensitivity and reduced photobleaching.
• Biosensing & Diagnostics: Integrated into immunoassays (e.g., ELISA) and FRET-based biosensors, where their strong and tunable emission improves detection limits for proteins, cancer biomarkers, and pathogens.
• Fluorescence-Guided Drug Delivery: Functionalized with biocompatible ligands (MPA, CA, GSH, PEG derivatives) to track drug carriers in vivo, allowing real-time monitoring of therapeutic distribution.
• Environmental Monitoring: Applied in chemical and heavy metal ion detection (e.g., Ag⁺ sensing), where fluorescence quenching or enhancement provides a sensitive readout for contaminants in water systems.
• Photocatalysis & Energy Research: Utilized in water-splitting and solar energy conversion studies, leveraging their high absorption in the UV-blue range and efficient charge transfer in aqueous media.
• Antibacterial & Biomedical Applications: Demonstrated antibacterial activity against pathogenic bacteria, opening potential for theranostic systems that combine imaging with antimicrobial functions.