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Related Experiment Video

Updated: May 20, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

Optically tunable amino-functionalized graphene quantum dots.

Hiroyuki Tetsuka1, Ryoji Asahi, Akihiro Nagoya

  • 1Toyota Central R&D Laboratories Inc.,Nagakute, Aichi 480-1192, Japan. h-tetsuka@mosk.tytlabs.co.jp

Advanced Materials (Deerfield Beach, Fla.)
|July 27, 2012
PubMed
Summary

Amino-functionalized graphene quantum dots with controlled properties were developed. These dots display bright, tunable fluorescence, enabling precise optical control through edge functionalization.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Graphene quantum dots (GQDs) are promising nanomaterials with unique optical and electronic properties.
  • Controlling the properties of GQDs, such as fluorescence, is crucial for their applications.
  • Edge functionalization is a key strategy for tuning GQD characteristics.

Purpose of the Study:

  • To develop a method for self-limited extraction of amino-functionalized graphene quantum dots (af-GQDs) with discrete molecular weights.
  • To investigate the precise control of optical properties through selective edge functionalization.
  • To demonstrate the bright and colorful fluorescence of af-GQDs under single-wavelength excitation.

Main Methods:

  • Self-limited extraction of af-GQDs from oxidized graphene sheets.

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Last Updated: May 20, 2026

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  • Selective and quantitative functionalization of af-GQDs at edge sites.
  • Characterization of af-GQDs' molecular weights and optical properties.

    • Main Results:

    • Discrete molecular weights of af-GQDs were achieved through self-limited extraction.
    • Precise control over optical properties was demonstrated via selective edge functionalization.
    • af-GQDs exhibited bright, colorful fluorescence under single-wavelength excitation.

    Conclusions:

    • The developed method allows for the controlled synthesis of af-GQDs with tunable optical properties.
    • Edge functionalization is a critical factor in achieving desired fluorescence characteristics.
    • af-GQDs hold potential for applications requiring tunable and bright fluorescence.