ZnS CdSe QDs (Zinc Sulphide/Cadmium Selenide Quantum Dots-580nm)

ZnS CdSe QDs(Zinc Sulphide/Cadmium Selenide Quantum Dots-580nm)

Product:ZnS CdSe QDs

Our ZnS CdSe QDs have high fluorescence efficiency, good chemical stability, low toxicity, easy cell absorb, superior to the ordinary core-shell structure.

ZnS CdSe QDs

Zinc Sulphide/Cadmium Selenide Quantum Dots-580nm

Product Name Cadmium Sulphide /Zinc Sulphide Quantum Dots
Stock No. NS6130-12-000123
CAS Number 1306-24-7 Confirm
Purity 99.9%  Confirm
Composition CdSe/ZnS Confirm
Emission Peak 580nm Confirm
Quantum Yield 80-90% Confirm
Average Particle Size (FWHM) 25-30nm Confirm
Solvent Toluene Confirm
Application Cell Imaging Application
Main Inspect Verifier Manager QC

Experts Review:

58496396Dr. Bruce Perrault, Ph.D (Georgia Institute of Technology (Georgia Tech), USA)
Quantum dots are semiconductor nanocrystals that have tunable emission through changes in their size. Producing bright, efficient quantum dots with stable fluorescence is important for using them in applications in lighting, photovoltaics, and biological imaging. In order to increase the fluorescence and stability of CdSe quantum dots were passivated with ZnS shell through the pyrolysis of organometallic precursors.

1252525Dr. Myron Rubenstein, Ph.D (Polytechnic University of Turin, Italy)
The inorganic passivation of nanocrystal with higher band gap materials, resulting in core/shell structure nanocrystals such as CdSe/ZnS and CdSe/CdS, showed high quantum efficiency up to 50% because of the robust passivation of the surface defects and also the quantum confinement effect which enhances exciton recombination in the core. The shell-protected CdSe/ZnSQDs exhibited higher photoluminescent (PL) efficiency and stability than their corresponding CdSe core QDs. The proper passivation of the nanocrystal surfaces is necessary to achieve a high quantum yield (QY).

2536582Dr. Huojin Chan (University of Science and Technology of China, Hefei, Anhui, China)
Quantum yield was observed to increase with increasing shell thickness until 3 monolayers, after which quantum yield decreased and the likelihood of flocculation of the colloid increased. The quantum yield also increased with increasing Zn:S ratio, possibly indicating that zinc atoms may substitute for missing cadmium atoms at the CdSe surface.

10604509_1459864657612760_2405225879143508610_oDr. Ms. Yi Yen Shi, (King Mongkut’s University of Technology Thonburi,Bangkok, Thailand)
With increasing time and temperatures the nanoparticles become slowly disordered hence the exciton energy decreases whereas the nanoparticle size increases slowly. It is due to size effect which depends on the thermodynamic properties of nanoparticles.

125448Dr. Hans Roelofs Ph.D (National Technical University of Athens, Greece)
CdSe/ZnS core-shell quantum dots (QDs) have received special interest from due to their high photoluminescence (PL) quantum yield (QY) with narrow bandwidth, large band gap tunability across the visible spectrum and robustness. Composite materials containing CdSe/ZnS nanocrystals are promising for a wide range of high-performance applications, as biosensors  high efficiency quantum-LEDs  photovoltaic devices and lasers.

zns cdse

Cadmium Selenide /Zinc Sulphide Quantum Dots

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