CdSe/ZnS core shell Nanoparticles (Cadmium Selenide/Zinc Sulphide, 99.9%, APS: 80-100nm, Inorganic Semiconductor)

CdSe/ZnS core-shell Nanoparticles

CdSe/ZnS core-shell nanoparticles are a class of semiconductor quantum dots that consist of a cadmium selenide (CdSe) core and a zinc sulfide (ZnS) shell. This core-shell structure is widely used in nanotechnology and materials science because it combines the unique properties of CdSe, a direct bandgap semiconductor, with the stability and passivation properties of ZnS, a wide bandgap semiconductor.

Applications

Biomedical and Biological Imaging

Fluorescent Imaging: CdSe/ZnS core-shell quantum dots are widely used in in vivo and in vitro imaging due to their strong fluorescence and long-term photostability. The tunable emission of CdSe/ZnS quantum dots allows for multicolor imaging, enabling the tracking of multiple biological targets in a single experiment.

Biosensing: These quantum dots are employed in biosensors for detecting biomolecules, pathogens, and diseases. The high quantum yield and tunable emission spectra allow for highly sensitive detection in diagnostic assays.

Drug Delivery: Functionalized CdSe/ZnS quantum dots can be used in targeted drug delivery systems for delivering therapeutic agents to specific cells or tissues. The fluorescent properties allow for real-time tracking of drug delivery and release in living organisms.

Optoelectronics

Quantum Dot Light-Emitting Diodes (QLEDs): CdSe/ZnS quantum dots are a key material in quantum dot-based light-emitting diodes (QLEDs). Due to their bright fluorescence, tunable emission, and long-term stability, these quantum dots are used in displays and lighting applications, particularly for high-quality color displays and backlighting systems.

Photodetectors and Solar Cells: The optical properties of CdSe/ZnS quantum dots, such as their ability to efficiently absorb light, make them suitable for use in photodetectors and quantum dot solar cells (QDSCs). These devices leverage the size-dependent absorption properties of quantum dots for high-performance energy harvesting.

Environmental Monitoring and Sensing

Chemical Sensing: CdSe/ZnS quantum dots can be used as chemical sensors for detecting environmental pollutants, gases, or heavy metals in water or air. The fluorescent nature of quantum dots makes them ideal for use in optical sensing technologies, where changes in fluorescence can indicate the presence of a specific analyte.

Photocatalysis: CdSe/ZnS quantum dots are also studied for photocatalytic applications, such as water splitting for hydrogen generation or carbon dioxide reduction. The high photoluminescence efficiency and charge separation properties make them promising candidates for clean energy production and environmental remediation.