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900222

Sigma-Aldrich

CdSe/ZnS core-shell type quantum dots

carboxylic acid functionalized, fluorescence λem 580 nm, 1 mg/mL in H2O

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Synonym(s):
Fluorescent nanocrystals, QDs
Linear Formula:
CdSe/ZnS
NACRES:
NA.23

form

dispersion

Quality Level

concentration

1 mg/mL in H2O

fluorescence

λem 580 nm
λem 580 nm±10 nm, quantum yield >50%

functional group

carboxylic acid

storage temp.

2-8°C

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This Item
900226900224900221
concentration

1 mg/mL in H2O

concentration

1 mg/mL in H2O

concentration

1 mg/mL in H2O

concentration

1 mg/mL in H2O

fluorescence

λem 580 nm, λem 580 nm±10 nm, quantum yield >50%

fluorescence

λem 645 nm, λem 645 nm±10 nm, quantum yield >50%

fluorescence

λem 620 nm, λem 620 nm±10 nm, quantum yield >50%

fluorescence

λem 540 nm, λem 540 nm±10 nm, quantum yield >50%

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

form

dispersion

form

dispersion

form

dispersion

form

powder

General description

Reactive group: Carboxylic acid.

Application

The organic layer of the CdS/ZnS or CdSe/ZnS quantum dots (QDs) with carboxylic acid as reactive group consist of a monolayer of oleic acid/octadecylamine and a monolayer of amphiphilic polymer. The total thickness of organic layers on these QDs is approximately 4 nm. They find many applications in bioimaging and biosensing.

Caution

Do not freeze.

Legal Information

Product of Ocean Nanotech, LLC.

pictograms

Environment

hcodes

Hazard Classifications

Aquatic Chronic 2

Storage Class

12 - Non Combustible Liquids

wgk_germany

WGK 3


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Zhanao Tan et al.
Nano letters, 7(12), 3803-3807 (2007-11-03)
We report a multilayer solution-processed blue light-emitting diode based on colloidal core/shell CdS/ZnS nanocrystal quantum dots (QDs). At a low-operating voltage of 5.5 V, the device emits spectrally pure blue radiation at 460 nm with a narrow full-width-at-half-maximum bandwidth of
Qingjiang Sun et al.
ACS nano, 3(3), 737-743 (2009-03-25)
Owing to their narrow bright emission band, broad size-tunable emission wavelength, superior photostability, and excellent flexible-substrate compatibility, light-emitting diodes based on quantum dots (QD-LEDs) are currently under intensive research and development for multiple consumer applications including flat-panel displays and flat
Bright, multicoloured light-emitting diodes based on quantum dots.
Sun Q, et al.
Nature Photonics, 1, 717-722 (2007)

Articles

Dr. Delehanty and researcher introduce recent advances in the use of cadmium-free quantum dots for bioimaging. Focus is placed on strategies that have emerged in the last five years for design, synthesis, and surface modifications of non-Cd quantum dots (QDs) for bioimaging and sensing applications.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service