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900726

Sigma-Aldrich

Graphene quantum dots

blue luminescent, powder

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Synonym(s):
GQDs
CAS Number:
EC Number:

Quality Level

description

topographic height: 1-2.0 nm

form

powder

color

brown

particle size

<5 nm

fluorescence

λex 350 nm; λem 445 nm±10 nm FWHM 75 nm, quantum yield ≥20%

InChI

1S/C

InChI key

OKTJSMMVPCPJKN-UHFFFAOYSA-N

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This Item
900713900560900712
Graphene quantum dots blue luminescent, powder

Sigma-Aldrich

900726

Graphene quantum dots

Graphene quantum dots aqua green luminescent, powder

Sigma-Aldrich

900713

Graphene quantum dots

Graphene quantum dots &gt;0.005% in H2O

Sigma-Aldrich

900560

Graphene quantum dots

Graphene quantum dots aqua green luminescent, 1&#160;mg/mL in H2O

Sigma-Aldrich

900712

Graphene quantum dots

fluorescence

λex 350 nm; λem 445 nm±10 nm FWHM 75 nm, quantum yield ≥20%

fluorescence

λex 485 nm; λem 525 nm FWHM 70 nm, quantum yield >17%

fluorescence

, quantum yield >50%

fluorescence

λex 485 nm; λem 530 nm±10 nm FWHM 80 nm, quantum yield ≥17%

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

description

topographic height: 1-2.0 nm

description

topographic height: 1–2.0 nm

description

-

description

topographic height: 1-2.0 nm

color

brown

color

-

color

-

color

yellow

particle size

<5 nm

particle size

-

particle size

-

particle size

-

Application

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.

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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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)
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

Articles

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.

Studies on perovskite quantum dots are developing and progress has been made toward overcoming the challenges of QDs. Strategies to fabricate high-quality materials have enabled rapid light-emitting device development.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

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