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900226

Sigma-Aldrich

CdSe/ZnS core-shell type quantum dots

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

Sinónimos:

Fluorescent nanocrystals, QDs

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1 ML
MXP 3,491.00

MXP 3,491.00


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1 ML
MXP 3,491.00

About This Item

Fórmula lineal:
CdSe/ZnS
Código UNSPSC:
26111700
NACRES:
NA.23

MXP 3,491.00


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Formulario

dispersion

Nivel de calidad

concentración

1 mg/mL in H2O

fluorescencia

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

grupo funcional

carboxylic acid

temp. de almacenamiento

2-8°C

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Descripción general

Reactive group: Carboxylic acid.

Aplicación

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]

Precaución

Do not freeze.

Información legal

Product of Ocean Nanotech, LLC.

Pictogramas

Environment

Frases de peligro

Consejos de prudencia

Clasificaciones de peligro

Aquatic Chronic 2

Código de clase de almacenamiento

12 - Non Combustible Liquids

Clase de riesgo para el agua (WGK)

WGK 3

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable


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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

Artículos

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.

      Helpful?

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