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Merck
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重要文件

900226

Sigma-Aldrich

CdSe/ZnS 核壳型量子点

carboxylic acid functionalized, fluorescence λem 645 nm, 1 mg/mL in H2O

同義詞:

Fluorescent nanocrystals, QDs

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About This Item

線性公式:
CdSe/ZnS
分類程式碼代碼:
26111700
NACRES:
NA.23
暫時無法取得訂價和供貨情況

形狀

dispersion

品質等級

濃度

1 mg/mL in H2O

螢光

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

官能基

carboxylic acid

儲存溫度

2-8°C

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相關類別

一般說明

Reactive group: Carboxylic acid.

應用

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]

注意

注意:不要冻存。

法律資訊

Product of Ocean Nanotech, LLC.

象形圖

Environment

危險聲明

防範說明

危險分類

Aquatic Chronic 2

儲存類別代碼

12 - Non Combustible Liquids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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分析證明 (COA)

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Hong Xu et al.
ACS applied materials & interfaces, 5(8), 2901-2907 (2013-04-05)
The excellent optical properties of quantum dots (QDs), such as high brightness, high photostability, continuous absorption, and narrow emission bandwidth, make them ideal as optical labels to develop QD-based immunohistofluorescence (IHF) imaging for multiplexing cancer biomarker detection on formalin-fixed and
Zengyan Wei et al.
Soft matter, 8(26), 6871-6875 (2012-09-18)
Genetically-engineered collagen peptides were assembled into freestanding films when QDs are co-assembled as joints between collagen domains. These peptide based films show excellent mechanical properties with Young's modulus of ~20 GPa, much larger than most of multi-composite polymer films and
Lily Yang et al.
Small (Weinheim an der Bergstrasse, Germany), 5(2), 235-243 (2008-12-18)
Epidermal growth factor receptor (EGFR) targeted nanoparticle are developed by conjugating a single-chain anti-EGFR antibody (ScFvEGFR) to surface functionalized quantum dots (QDs) or magnetic iron oxide (IO) nanoparticles. The results show that ScFvEGFR can be successfully conjugated to the nanoparticles

文章

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

Questions

1–3 of 3 Questions  
  1. Do the CdSe/ZnS core-shell type quantum dots (product no. 900226) blink when excited with red light? Or are they useful in stochastic optical reconstruction microscopy where blinking is required?

    1 answer
    1. No, this product does not blink when excited by a red light. Therefore, they may not be suitable for applications in stochastic optical reconstruction microscopy where blinking is required.

      Helpful?

  2. What is the exact size (in nm) of this QD?

    1 answer
    1. The inorganic size of these QDs is approximately 8.1 nm and the hydrodynamic size is approximately 18 nm.

      Helpful?

  3. The CdSe/ZnS quantum dots (product no. 900226) are indeed capable of single-photon emission. Some literature sources mention the use of quantum dots from Sigma-Aldrich as single-photon sources.

    1 answer
    1. It is advised that all fluorophores should exhibit single-photon emission. Additionally, our quantum dots (QDs) also demonstrate single-photon emission.

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