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790192

Sigma-Aldrich

CdSe/ZnS core-shell type quantum dots

stabilized with octadecylamine ligands, fluorescence λem 620 nm, solid

Synonym(s):

Artificial atoms, Fluorescent nanocrystals, QDs

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10 MG
$320.62
25 MG
$721.56

$320.62

List Price$391.00Save 18%

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10 MG
$320.62
25 MG
$721.56

About This Item

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

$320.62

List Price$391.00Save 18%

In StockDetails


Request a Bulk Order

Quality Level

form

solid

fluorescence

λem 620 nm

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Application

CdSe/ZnS core/shell nanocrystals in solid form are highly purified quantum dots. They can be dispersed in most non-polar organic solvents such as toluene, chloroform, hexane, etc. With very low organic impurity, these quantum dots are specifically designed as emitters for optoelectronic applications such as display and solid state lighting.

Protocol to make QD solutions (dispersing QDs into solutions):

1. Weigh desired amount of the quantum dot powder and put it in a glass vial;
2. Add desired amount of the solvent, i.e. toluene, chloroform, hexane, etc. (mostly non-polar organic solvents) in the vial and shake the vial;
3. If there is any solid left in the vial after shaking, sonicate the vial for 30~60 seconds to get the quantum dot powder well dispersed. If required dilute the solution further.

Material has a shelf life of around 3 years if stored properly. Store at room temperature (4-25 °C); do not freeze. Should not be exposed to extreme temperatures.

Legal Information

Product of Ocean Nanotech, LLC

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Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Irrit. 2 - STOT RE 2 - STOT RE 2 Oral

target_organs

Kidney,Bone, Liver,Gastrointestinal tract,Immune system

supp_hazards

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Articles

Quantum dots are tiny particles or nanocrystals of a semiconducting material with diameters in the range of 2-10 nanometers.

Dye-sensitized solar cells as a promising, low-cost photovoltaic technology.

Professor Sharma and colleagues review the synthesis and applications of this novel material. This includes a discussion of the unique properties of quantum dots and their suitability for solar cell applications, along with common synthesis techniques used to develop these materials.

Professor Xiaohu Gao (University of Washington, USA) provides a overview of recent quantum dot (QD) advancements and their potential for advancing bioassay and bioimaging technologies.

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Questions

1–4 of 4 Questions  
  1. What is the particle density for product 790192, CdSe/ZnS core-shell quantum dots?

    1 answer
    1. The particle density is not determined for this product.

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  2. What is the molecular weight of CdSe/ZnS core-shell type quantum dots, and what is the recommended method for their dissolution?

    1 answer
    1. The molecular weight information for CdSe/ZnS core-shell type quantum dots is typically not provided in the QD field, as it can be calculated based on the quantum effect via size. The recommended solvents for dissolving CdSe/ZnS core-shell type quantum dots include chloroform, toluene, xylene, and THF. The procedure for dissolution involves adding the solvent to the QD solid, shaking it for 3 minutes, and sonication for 20 seconds if the QDs are not completely dispersed. If toluene is the solvent, any grade of toluene can be used. No specific equipment is needed for dissolving CdSe/ZnS core-shell type quantum dots; shaking the vial is sufficient.

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  3. What is the particle size and shell size for product 790192, CdSe/ZnS core-shell quantum dots?

    1 answer
    1. The particle size of the core and shell is about 8 nm and that of the surface ligand is 2 nm.

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  4. What is the Department of Transportation shipping information for this product?

    1 answer
    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

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