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Surface Modified

Stock No.
NS6130-12-000188
CAS
1315-09-9
MSDS
MSDS-PDF
Specifications
SPEC-PDF
COA
COA-PDF
Catalogue

Semiconductor Quantum Dots

(Zinc Selenide /Zinc Sulphide-PEG-COOH QDs)
Semiconductor Quantum Dots
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Preview
Zinc Selenide /Zinc Sulphide-PEG-COOH QDs – 430±10nm
ProductSemiconductor Quantum Dots
Stock No.NS6130-12-000188
CAS1315-09-9Confirm
Purity99.9%Confirm
Emission Peak430±10nmConfirm
Surface GroupPEG-COOHConfirm
Molecular FormulaZnSe/ZnSConfirm
SolventWaterConfirm
ApplicationBio-Conjugation with Bio-MoleculesConfirm
Quality ControlEach Lot of Semiconductor Quantum Dots was tested successfully
Main Inspect VerifierManager QC

Typical Chemical Analysis

Assay99.9%
Other Metal800ppm

Expert Reviews

product-expert-image
Dr. Ms. Kamiko Chang Ph.D(University of Science and Technology Beijing, China)

QDs have particularly interesting fluorescence properties, the emission wavelength depends strongly on the particle size and the nature of the corresponding phase, it is possible then to excite them in a wide wavelengths range below the wavelength of fluorescence. Their fluorescence performance exceeds those of conventional organic dyes. In addition to that, the quantum yield fluorescence and emission wavelength are greatly influenced by the particle size, which is directly related to their method of preparation, the nature and proportion of the doping element.

product-expert-image
Dr. Nicholaos G. Demas (Newcastle University School Of Machanical & Systems Engg. UK)

Structuring agents (ligands) as organic molecules play a key role in the stability of the nanocrystals, they surround the surface of the nanocrystals by steric repulsion between particles, allowing them suspended in a suitable solvent, a lack of ligands leads to particle aggregation. The affinity of ligands with particle surface depends on the interaction of their functional groups and their chain length with the surface.

product-expert-image
Dr. Bruce Perrault Ph.D (Georgia Institute of Technology (Georgia Tech), USA)

The ligands are not linked to the surface, but they are in constant exchange between the free and the bound forms which allows the particles to grow during synthesis. In general, the ligands have growth control ability, several types of ligands can be used in the syntheses, and their relative affinity to the surface is the parameter which scientists use to modify the reactivity of different crystal faces to obtain particular sizes and shapes of nanocrystals. The ligands may also play a direct role in the reaction mechanism, leading to different crystal structures.

product-expert-image
Dr. Huojin Chan (University of Science and Technology of China, Hefei, Anhui, China)

Nevertheless, ligands have a capacity to burn off the ability of the nanocrystals surface, the dangling bonds due to surface atoms can create loads that cannot be compensated by neutral ligands. In addition, the ligands form an insulating layer that can be used to confine the charges in the nanocrystal and protect their fluorescence even without shell.

product-expert-image
Dr. Darren Chandler Ph.D(Manchester Metropolitan University, U.K)

Surface modified Znse/Znsquantu dots have cubic zinc blende structure. The enhancement of the luminescent ZnSe/Zns QD by doping the  main phase using various elements as metals, transition metals and halides can serve for imaging of the positive cells especially used for cancer identification cells and life cell imaging. The application was based on conjugated ZnS using folic acid to detect cancer in lung fibroblast cell.

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Semiconductor Quantum Dots

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From us, you can easily purchase Semiconductor Quantum Dots (Zinc Selenide /Zinc Sulphide-PEG-COOH QDs) at great prices. Place online order and we will dispatch your order through DHL, FedEx, UPS. You can also request for a quote by mailing us at sales@nanoshel.com. We invite you to contact us for further information about our company and our capabilities. At Nanoshel, we could be glad to be of service to you. We look forward to your suggestions and feedback.
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