QD Products
Mesolight’s GA_CdS/ZnS QDs
Size-dependent fluorescence property is probably the most unique and attractive feature of QDs. For instance, through controlling the particle size from 2-6 nm, the emission from CdSe QDs can be continuously tuned to from green to red that covers entire visible wavelength range. However, there are two issues associated with the fabrication and application of binary QDs such as CdSe. First, the formation of defects and surface-trap states results in the low luminescence efficiency and stability deficits. Although this problem can be minimized through nanocrystal surface-passivation with high bandgap inorganic material such as the most commonly used ZnS, the largely lattice mismatch between the core nanocrystal and passivation shell layer usually degrade the optical properties. Second, the extinction coefficient of QDs is also size-dependent – proportional to the volume of the particle. This means species labeled with 6 nm CdSe QDs will emit red light that is ~30 times stronger than the green light from a species that labeled with 2 nm green emitting QDs.
Unlike binary QDs, the GA_CdS/ZnS QDs we developed are tuned to have different emissions by changing their composition in both CdS core and ZnS shells. This allows the preparation of GA QDs with the approximately the same particle sizes (hence the same absorption and emission intensity) but different emission wavelength. Subsequently, this will enable the measurement of each of the species with the equal sensitivity. Our GA_QDs possess higher and more stable PL emission due to larger particle size, higher crystalline, hardened lattice structure, lower inter-diffusion, and spatial compositional fluctuation.
Technical Specifications

Emission Peak: 400-460 nm
FWHM: 18-25 nm
Quantum Yield: 50-90%
Surface Group: Octadecylamine (or customer required ligands)
Solvent: Toluene (or customer required solvents)

Shopping Cart
GA_CdS/ZnS QDs
Emission Peak
Quantum Yield
FWHM
Quality
Price
Quantity
Catalog
405 nm50-80%<25 nm5mg $99
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GA_CdS/ZnS-405-05
15mg $199
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GA_CdS/ZnS-405-15
25mg $299
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GA_CdS/ZnS-405-25
420 nm50-80%25 nm5mg $99
- +
GA_CdS/ZnS-420-05
15mg $199
- +
GA_CdS/ZnS-420-15
25mg $299
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GA_CdS/ZnS-420-25
440 nm60-90%<25 nm5mg $99
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GA_CdS/ZnS-440-05
15mg $199
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GA_CdS/ZnS-440-15
25mg $299
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GA_CdS/ZnS-440-25
460 nm60-90%26 nm5mg $99
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GA_CdS/ZnS-460-05
15mg $199
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GA_CdS/ZnS-460-15
25mg $299
- +
GA_CdS/ZnS-460-25
※We also provide samples with customer specified surface groups, solvent, concentration, and emission wavelength.