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Water Soluble Cadmium Selenide Quantum Dots (CdSe/ZnS) 500 nm

Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) core–shell quantum dots, precisely engineered for a 500 nm emission, deliver a high-performance solution for green-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 500 nm dots as a reliable material for both research and industrial applications.

Technical Properties

Configurable Parameters

Applications

• Multiplexed Bioimaging: Provides a strong green emission ideal for multi-color imaging in biological systems, enabling simultaneous visualization of multiple cellular targets.
• Biosensing & Diagnostics: Integrated into immunoassays and FRET-based biosensors, where the 500 nm emission enhances sensitivity for detecting proteins, pathogens, and disease biomarkers.
• Fluorescence-Guided Drug Delivery: Functionalized with biocompatible ligands to track therapeutic carriers in vivo, offering precise monitoring of drug distribution pathways.
• Environmental Monitoring: Applied in aqueous sensing systems for detecting heavy metal ions and pollutants, leveraging fluorescence quenching or enhancement for sensitive readouts.
• Photocatalysis & Energy Research: Utilized in solar energy conversion and photocatalytic water-splitting studies, benefiting from efficient charge transfer in aqueous environments.
• Biomedical Applications: Suitable for integration into theranostic platforms that combine imaging with therapeutic functions, thanks to their strong green emission and biocompatibility.