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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

Synonym(s):

Fluorescent nanocrystals, QDs

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$166.00

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1 ML
$166.00

About This Item

Linear Formula:
CdSe/ZnS
UNSPSC Code:
26111700
NACRES:
NA.23

$166.00


Available to ship onMay 01, 2025Details


Request a Bulk Order

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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Related Categories

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.[1][2][3]

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

flash_point_f

Not applicable

flash_point_c

Not applicable


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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)
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

Articles

Cadmium-free quantum dots for bioimaging offer design and synthesis strategies, enhancing bioimaging and sensing applications.

Questions

1–2 of 2 Questions  
  1. How stable are the polymer layers in organic solvents such as dimethylformamide (DMF) and acetonitrile

    1 answer
    1. This product is prepared in water. While the stability of these QDs in organic solvents has not been evaluated, powder versions of CdSe/ZnS core-shell type quantum dots are stable when prepared in organics solvents such as Chloroform, Toluene, Xylene, and THF.

      Helpful?

  2. What is the exact size of this QD?

    1 answer
    1. The particle size for this item is 7.4 nm

      Helpful?

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