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900713

Sigma-Aldrich

Graphene quantum dots

aqua green luminescent, powder

Synonym(s):

GQDs

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About This Item

CAS Number:
EC Number:
UNSPSC Code:
11101522
NACRES:
NA.23

Quality Level

description

topographic height: 1–2.0 nm

form

powder

diameter

<5 nm

fluorescence

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

InChI

1S/C

InChI key

OKTJSMMVPCPJKN-UHFFFAOYSA-N

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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.
  • Bioimaging 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.

Synthesis and Applications of Graphene Nanoribbons Synthesized

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