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Water Soluble Cadmium Selenide Quantum Dots (CdSe/ZnS) 545 nm

Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) core–shell quantum dots, engineered for a precise 545 ± 10 nm emission, provide a robust solution for green–yellow optical applications. The CdSe core is epitaxially passivated with a ZnS shell, minimizing surface defects and suppressing non-radiative recombination, which ensures high photoluminescence efficiency and long-term stability. These nanocrystals exhibit a narrow FWHM (<28 nm) and outstanding quantum yields (>70% with MPA/CA/GSH ligands, >60% with PEG-COOH/PEG-NH2 ligands), delivering bright, spectrally pure signals with minimal overlap. Their water-soluble ligand chemistry guarantees excellent dispersibility in aqueous systems, enabling seamless integration into biosensing, fluorescence imaging, and advanced photonic platforms. Combining optical precision, biocompatibility, and versatile surface functionalization, the 545 nm dots stand out as a reliable material for both research and industrial applications.

Technical Properties

Configurable Parameters

Applications

• Multiplexed Bioimaging: Strong green–yellow emission supports multi-color imaging in biological systems, allowing simultaneous visualization of diverse cellular targets.
• Biosensing & Diagnostics: Incorporated into immunoassays and FRET-based biosensors, the 545 nm emission enhances sensitivity for detecting proteins, pathogens, and biomarkers.
• Fluorescence-Guided Drug Delivery: Functionalized with biocompatible ligands to track therapeutic carriers in vivo, enabling precise monitoring of drug distribution pathways.
• Environmental Monitoring: Applied in aqueous sensing systems for heavy metal ion and pollutant detection, leveraging fluorescence quenching/enhancement for sensitive readouts.
• Photocatalysis & Energy Research: Utilized in solar energy conversion and photocatalytic water-splitting, benefiting from efficient charge transfer in aqueous environments.
• Biomedical Applications: Suitable for theranostic platforms combining imaging and therapy, thanks to strong emission intensity and biocompatibility.