The first exciton absorption peak is around 525 nm, so these quantum dots can be efficiently excited by any wavelength shorter than 525 nm, including a 455 nm laser. The quantum dots can be dispersed in toluene and cyclohexane. There is no in-house photostability data that can be shared, as it is not part of routine QC testing. Based on published studies and internal experience, these quantum dots are typically at least ten times more photostable than organic dyes reported in early literature.
748056
CdSe/ZnS core-shell type quantum dots
stabilized with octadecylamine ligands, fluorescence λem 540 nm, solid
Synonym(s):
Artificial atoms, Fluorescent nanocrystals, QDs
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10 MG
CLP 287,000
25 MG
CLP 627,000
About This Item
Linear Formula:
CdSe/ZnS
NACRES:
NA.23
UNSPSC Code:
26111700
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Product Name
CdSe/ZnS core-shell type quantum dots, stabilized with octadecylamine ligands, fluorescence λem 540 nm, solid
form
solid
fluorescence
λem 540 nm
Quality Level
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Related Categories
1 of 4
This Item | 748021 | 748080 | 748129 |
|---|---|---|---|
| fluorescence λem 540 nm | fluorescence λem 520 nm | fluorescence λem 560 nm | fluorescence λem 580 nm |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| form solid | form solid | form solid | form solid |
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.
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
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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Articles
Perovskite quantum dots research progresses overcoming challenges, enabling rapid development of light-emitting devices.
Dye-sensitized solar cells as a promising, low-cost photovoltaic technology.
Research focuses on sustainable and cost-effective power generation systems to meet the growing demand for environmentally friendly energy sources.
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.
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What is the absorption peak for these QDs, can they be excited using a 455 nm laser? And what are the storage conditions? Can toluene and cyclohexane be used to disperse these QDs and is there any photostability data available for them?
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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