CdS/ZnS core-shell type quantum dots lyophilized, fluorescence λem 400 nm, solid
CdS/ZnS or CdSe/ZnS quantum dots (QDs) with carboxylic acid in lyophilized solid form can be readily reconstituted in DI water or DMSO to any desired concentration and are very stable in most buffer solutions with a pH range of 5-10. These QDs possess a zeta potential in the -30 mV to -50 mV range and can easily be reacted with amine containing molecules in DMSO or water. These QDs find applications in bioimaging and biosensing…
| CdS/ZnS core-shell type quantum dots | |
| Product No. | NRE-21002 |
| Concentration | 5mg/ml |
| Purity | 99.9% |
| Formula | CdS/ZnS |
| Florescence | Λem 400nm |
| APS | <10nm |
| Solvent | Toluene |
| Quantum Yield | 40-80% |
| FWHM | <30nm |
| Form | Solid |
CdS/ZnS core-shell type quantum dots
CdS/ZnS core-shell type quantum dots are semiconductor nanomaterials where the core is composed of cadmium sulfide (CdS) and the shell is made of zinc sulfide (ZnS). These types of quantum dots have been extensively studied and developed due to their enhanced optical properties, including better stability, tunable fluorescence, and superior quantum yield compared to core-only quantum dots. The core-shell structure improves the performance of quantum dots in various applications, especially in fields requiring high photostability, high luminescence, and low toxicity.
Optoelectronics
Light Emitting Diodes (LEDs): CdS/ZnS core-shell type quantum dots are used in LEDs due to their bright fluorescence and tunable emission properties. The core-shell structure allows for better control over the emission wavelength and increased durability.
Solar Cells: Quantum dots are also applied in solar cells, specifically in quantum dot-sensitized solar cells (QDSCs), where CdS/ZnS quantum dots can enhance light absorption and electron transfer efficiency.
Bioimaging and Biosensing
Fluorescence Imaging: The high photoluminescence of CdS/ZnS quantum dots makes them excellent candidates for use in biological imaging. Their size and surface properties can be tailored to attach to biomolecules, allowing for targeted imaging of cells, tissues, and organs.
Fluorescent Probes: These quantum dots can serve as probes for detecting specific biomolecules. Their luminescence can be detected using fluorescence microscopy or flow cytometry, offering high sensitivity.
Biomarker Detection: CdS/ZnS quantum dots are used for biosensors for detecting diseases, pathogens, or environmental pollutants. The quantum dots can be functionalized with specific ligands or antibodies to recognize target analytes.
Photocatalysis
Water Splitting: CdS/ZnS quantum dots are also investigated for photocatalytic water splitting to generate hydrogen fuel. The ZnS shell reduces surface defects in CdS, improving its stability and photocatalytic efficiency under light irradiation.
