Insoluble ZnCdS/ZnS QDs

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Product Structure: ZnCdS/ZnS with a silica coating on the surface.

Product Applications: Optical labeling, sensing, imaging components, etc.

Product Description

Insoluble ZnCdS/ZnS quantum dots (QDs) are semiconductor nanomaterials designed for applications that require stable, solid-state fluorescent probes. Unlike solvent-dispersible quantum dots, these particles are engineered to remain insoluble, enabling their direct use in systems where particle immobilization, surface attachment, or solid-phase integration is required. Their robust optical response and structural durability make them suitable for a variety of advanced research applications.

Structural Characteristics

The structure of Insoluble ZnCdS/ZnS QDs consists of a ZnCdS alloy core and a ZnS shell, followed by a silica coating on the outer surface. The ZnCdS alloy core enables tunable optical properties while reducing lattice mismatch with the ZnS shell compared with traditional single-component cores. The ZnS shell acts as an effective passivation layer that suppresses surface trap states and enhances radiative recombination efficiency. The outer silica layer further stabilizes the nanocrystal structure, protects the core–shell interface from environmental degradation, and contributes to the formation of insoluble, structurally stable particles.

Key Characteristics

Insoluble ZnCdS/ZnS QDs exhibit high photoluminescence efficiency and narrow full width at half maximum (FWHM), enabling precise and well-defined emission profiles. The alloyed ZnCdS core combined with the ZnS shell effectively improves optical performance while maintaining structural stability. In addition, the reduced cadmium content in the ZnCdS alloy system helps lower potential toxicity while preserving strong fluorescence performance, making these quantum dots suitable for advanced optical applications.

Product Parameters

Catalog Number	PL Emission	FWHM	Quantum Yield	Solubility
NM-QD0290	410±10 nm	≤18 nm	≥80%	Insoluble, powder form
NM-QD0291	430±10 nm	≤20 nm	≥80%	Insoluble, powder form
NM-QD0292	450±10 nm	≤22 nm	≥80%	Insoluble, powder form
NM-QD0293	470±10 nm	≤22 nm	≥80%	Insoluble, powder form

*If you can't find the needed QDs in the table, please send us an inquiry.

With extensive experience in nanomaterial development, Alfa Chemistry provides high-quality Insoluble ZnCdS/ZnS QDs featuring reliable fluorescence performance and excellent structural stability. If you are interested in our products, please feel free to contact us. We look forward to cooperating with you.

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