Perovskite Quantum Dots Supplier - Alfa Chemistry

CdSeS/ZnS alloyed Quantum Dots

Product Description

CdSeS/ZnS alloy quantum dot (QD) is a quantum dot-based semiconductor material made by mixing CdSeS quantum dot solution with Zn(OAc)2 solution. Its luminescent properties make it useful in a variety of electronic and optoelectronic applications. These light and heat resistant quantum dot materials have comparable fluorescence and molecular dynamics in all colors. The narrow and sharp emission peaks result in less peak overlap during multiplexing. CdSeS/ZnS quantum dots can be used in the preparation of organic light emitting diodes. It can also be used for single dot imaging and other biological imaging. It can potentially be used as a color conversion light emitter for solid-state lighting applications.

Alfa Chemistry offers high-quality water-soluble CdSeS/ZnS alloyed quantum dot products. It is a core-shell fluorescent nanomaterial covered with hydrophilic ligands. We can customize products for any wavelength from 575 nm to 665 nm.


Uniform particle size


High and stable fluorescence intensity

High quantum field


Medical Imaging

Rana et al. prepared L-Glutathione (L-GSH)-capped L-GSH-CdSeS/ZnS core/shell quantum dots for the observation of MCF-7 human breast cancer cells. Time- and dose-dependent studies were done to investigate the cell penetration and visualization of QDs within cancer cells. The percentage of cell viability of cancer cells at different QDs dose concentrations was derived by MTT assay. The cytotoxicity of capped CdSeS/ZnS QDs to non-cancerous healthy cells was also investigated. Human cancer cells were treated with selected doses of QDs for different times and then counterstained with fluorescent DAPI nuclear stain to observe QD-mediated reflective effects. The small-sized QDs were mainly localized in the cytoplasm of MCF-7 cells and showed no significant cytotoxicity to healthy cells. The results suggest that the newly synthesized L-GSH-CdSeS/ZnS nuclear/shell QDs are highly biocompatible and have great potential applications in biomarkers and imaging for cancer diagnosis.

Schematic diagram of L-GSH-CdSeS/ZnS core/shell quantum dots for observation of human breast cancer cells.Fig.1 Schematic diagram of L-GSH-CdSeS/ZnS core/shell quantum dots for observation of human breast cancer cells. (Rana et al., 2020)

Fluorescent Sensors

L-glutathione-functionalized CdSeS/ZnS quantum dots (QDs) were synthesized and used as sensors for the detection of environmentally hazardous metal ions (Pb2+, Zn2+, Cr2+, Co2+, and Cu2+) by Rana et al. It was observed that the optical response of L-GSH-CdSeS/ZnS was related to the pH of the environment and the lifetime of the QDs. A strong "Turn-on" response was observed for Pb2+ and Zn2+, and an "Turn-off" response was observed for Cr3+. Organic capping makes CdSeS/ZnS QDs a suitable candidate for the development of selective and sensitive sensors to monitor hazardous analytes in the aqueous environment.

Schematic diagram of the L-glutathione-capped CdSeS/ZnS quantum dot sensor for the detection of hazardous metal ions.Fig.2 Schematic diagram of the L-glutathione-capped CdSeS/ZnS quantum dot sensor for the detection of hazardous metal ions. (Rana et al., 2019)

Alfa Chemistry can provide a variety of complex and customized core-shell fluorescent quantum dot products. Our products involve a variety of fluorescent quantum dot products. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.


  1. Rana, Meenakshi, et al. Glutathione capped core/shell CdSeS/ZnS quantum dots as a medical imaging tool for cancer cells. Inorganic Chemistry Communications, 2020, 112: 107723.
  2. Rana, Meenakshi, and Papia Chowdhury. L-glutathione capped CdSeS/ZnS quantum dot sensor for the detection of environmentally hazardous metal ions. Journal of Luminescence, 2019, 206: 105-112.
* It should be noted that our service is only used for research, not for clinical use.


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