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900712

Sigma-Aldrich

Graphene quantum dots

aqua green luminescent, 1 mg/mL in H2O

Sinónimos:

GQDs

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50 ML
MXP 2,251.00

MXP 2,251.00


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50 ML
MXP 2,251.00

About This Item

Número de CAS:
Número MDL:
Código UNSPSC:
11101522
NACRES:
NA.23

MXP 2,251.00


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Nivel de calidad

descripción

topographic height: 1-2.0 nm

Formulario

suspension

concentración

1 mg/mL in H2O

color

colorless

diámetro

<5 nm

fluorescencia

λex 485 nm; λem 520-540 nm±10 nm FWHM 80 nm, quantum yield ≥17%

cadena SMILES

[C]

InChI

1S/C

Clave InChI

OKTJSMMVPCPJKN-UHFFFAOYSA-N

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Descripción general

Graphene quantum dots (GQDs), sheets of few-layered graphene and lateral dimensions smaller than 100 nm, possess strong quantum confinement and edge effects. Thus, they possess unique physical properties such as strong photoluminescence, which can be tailored for specific applications by controlling their size, shape, defects, and functionality. In contrast to classic QDs, such as metal or silicon quantum dots, GQDs are biocompatible, photo-stable, and inherit superior thermal, electrical, and mechanical properties from the graphene. These features can greatly contribute to various state-of-the-art applications:
  • Optical brighteners.
  • Taggants for security application.
  • Bio-imaging markers.
  • Fluorescent polymers.
  • Antibacterial, antibiofouling, disinfection systems.
  • Heavy metals, humidity and pressure sensors.
  • Batteries.
  • Flash memory devices.
  • Photovoltaic devices.
  • Light-emitting diodes.

Código de clase de almacenamiento

12 - Non Combustible Liquids

Clase de riesgo para el agua (WGK)

nwg

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable


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Jianhua Shen et al.
Chemical communications (Cambridge, England), 48(31), 3686-3699 (2012-03-14)
Similar to the popular older cousins, luminescent carbon dots (C-dots), graphene quantum dots or graphene quantum discs (GQDs) have generated enormous excitement because of their superiority in chemical inertness, biocompatibility and low toxicity. Besides, GQDs, consisting of a single atomic
An electrochemical avenue to green-luminescent graphene quantum dots as potential electron-acceptors for photovoltaics.
Yan Li et al.
Advanced materials (Deerfield Beach, Fla.), 23(6), 776-780 (2011-02-03)

Artículos

Properties, synthesis & applications of Graphene Quantum Dots explained. GQDs have advantages of nontoxicity, good solubility, stable photoluminescence & better surface grafting.

Graphene nanoribbons (GNRs) are quasi-one-dimensional narrow strips of graphene comprised of sp2-hybridized carbon atoms arranged into hexagonal honeycomb lattice configurations.

Perovskite quantum dots research progresses overcoming challenges, enabling rapid development of light-emitting devices.

Questions

  1. Hi I am interested in the graphene dots for toxicity study but i am wondering if you could clarify the concentration of >0.005% in H2O part. Does that mean >50ppm? is it possible to provide me the exact concentration in ppm (and FWHM, ex/em)? thanks!

    1 answer
    1. This product is not offered as a percent solution. The concentration is 1 mg/mL. The density of this preparation is 1.008 g/mL. To convert the unit to ppm, 1 mg/mL / 1.008 g/mL = 0.000992 mg/mg = 992 ppm. The FWHM and ex/em wavelength are listed on the product detail page as below:
      λex: 485 nm
      λem: 530 nm ±10 nm
      FWHM: 80 nm

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