Oil Dispersible CdS Quantum Dots
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Product Introduction
Quantum dots (QDs) are unique nanocrystalline semiconductors whose electronic and optical properties depend on the size and shape of the quantum dots. These particles are between 2-10 nm in diameter, which is approximately 10-50 times the length of an atom. Oil dispersible CdS quantum dots, surface wrapped by hydrophobic ligands fluorescent nanomaterials, average quantum yield of more than 60%, should be stored away from direct sunlight, 4 degrees sealed in the dark, can be customized for customers to produce different grams of products at any wavelength from 380 nm to 460 nm. The product has uniform particle size, broad absorption spectrum, narrow and symmetric emission spectrum, high and stable fluorescence intensity. It can be used in solar cells, light-emitting devices and biofluorescent labeling.
Applications
Cadmium sulfide is widely used to sensitize TiO2 for visible light driven applications. TiO2/CdS composites can be prepared by sol-gel, chemical bath deposition and electrodeposition techniques. To obtain improved photoelectrochemical performance, ordered mesoporous TiO2 was incorporated into the quantum-confined inorganic semiconductor sensitizer. Mesoporous titania allows more light to be collected due to its larger surface area and multiple scattering. It also possesses continuous pore channels that facilitate the transfer of reactant molecules. Li et al. report a new efficient and stable visible-light-driven photocatalyst in which highly dispersed semiconductor quantum dots are incorporated into the framework of ordered mesoporous TiO2. Introducing CdS QDs into the TiO2 pore wall framework can effectively extend the photoreaction of TiO2 to the visible light region and accelerate the electron transfer between CdS and TiO2 without destroying the ordered mesoporous structure, which is beneficial for visible light catalysis.
Fig.1 (a) Standard TEM of CdO/TiO2, (b) TEM image of CdS/TiO2, (c) The chemical map of CdS/TiO2 (red areas correspond to the S distribution) and (d) HRTEM image of CdS/TiO2. (Li, 2009)
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.
References
- Xiang X, Zhu B, Cheng B, et al. Enhanced photocatalytic H2-production activity of CdS quantum dots using Sn2+ as cocatalyst under visible light irradiation. Small, 2020, 16(26): 2001024.
- Li, G. S., et al. A New Visible-Light Photocatalyst: CdS Quantum Dots Embedded Mesoporous TiO2. Environmental Science & Technology, 2009, 43(18):7079.
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