Perovskite Quantum Dots Supplier - Alfa Chemistry

CdS/ZnS Core-shell Type Quantum Dots Solid


Product Description

Highly purified CdS/ZnS core-shell type quantum dots with oleic acid surface ligand contain extremely low free organic ligands and impurities. They are well suited for display, solid state lighting, and solar cell applications. Alfa Chemistry provides customers appropriate CdS/ZnS core-shell type quantum dots with wavelength of 400 nm to 450 nm, also, we can custom the products if you want.


Rosenzweigl et al. found that CdS quantum dots stabilized by 1-hydrophobic glycerol exhibited fluorescence burst when interacting with Cu2+ ions, while quantum dots stabilized by L-cysteine exhibited fluorescence enhancement when interacting with Zn2+ ions. Kerim et al. designed a pentapeptide with five amino acid sequences and used it as a stabilizer to synthesize CdS quantum dots, which could be used for the detection of Cu2+ and Ag+ according to the fluorescence burst or fluorescence enhancement, respectively. Isarox et al. used CdS quantum dots for the determination of Cu2+. He concluded that Cu2+ are rapidly reduced to monovalent Cu+ when they are on the surface of CdS quantum dots. The monovalent Cu+ cause the recombination of excited electrons in the conduction band and holes in the valence band of the quantum dot core, resulting in the fluorescence burst of the quantum dot and the red shift of the quantum dot emission peak. Yang et al. integrated Cd:ZnS QDs into ZIF-8 that can interact specifically with Cu2+ for fluorescence sensing.

Fig. 1 Synthetic procedure of Cd:ZnS QDs@ZIF-8 and the mechanism for selective detection of Cu2+. (Yang, 2020)Fig. 1 Synthetic procedure of Cd:ZnS QDs@ZIF-8 and the mechanism for selective detection of Cu2+. (Yang, 2020)

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. Chen Y, Rosenzweig Z. Luminescent CdS quantum dots as selective ion probes. Anal.Chem., 2002, 74: 5132-5138.
  2. Kerim M, Gattas Asfura, Roger M, et al. Peptide-coated CdS quantum dot for the optical detection of copper and silver[J]. Chem. Comm., 2003, 21:2684-2688.
  3. Isarox A V, Rysochoos J. Optical and photochemical properties of nonstoichiometric cadmium sulfide nanopartides: surface modification with copper(II) ions[J]. Langmuir,1997, 13(12): 3142-3146.
  4. Amma, B. S., et al. Synthesis and optical properties of CdS/ZnS coreshell nanoparticles[J]. Materials Chemistry & Physics, 2008, 112(3):789-792.
  5. Yang, W. , et al. Integration of Cd:ZnS QDs into ZIF-8 for enhanced selectivity toward Cu2+ detection[J]. Inorganic Chemistry Frontiers, 2020.
* It should be noted that our service is only used for research, not for clinical use.


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