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Related Experiment Video

Updated: Sep 24, 2025

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A protocol for size separation of nanographenes.

Ikuya Matsumoto1, Ryo Sekiya1, Takeharu Haino1

  • 1Department of Chemistry, Graduate School of Science, Hiroshima University 1-3-1 Kagamiyama, Higashi-Hiroshima Hiroshima 739-8526 Japan haino@hiroshima-u.ac.jp.

RSC Advances
|May 9, 2022
PubMed
Summary

Top-down methods produce nanographenes with varied sizes. Using dialysis membranes, researchers successfully separated these nanographenes into five distinct size distributions for advanced material applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Top-down synthesis is a common method for producing nanographenes.
  • However, this method results in a broad size distribution of graphene fragments.
  • Controlling the size of nanographenes is crucial for their application in functional materials.

Purpose of the Study:

  • To develop a convenient method for separating nanographenes based on size.
  • To demonstrate the utility of size-separated nanographenes as precursors for carbon-based functional materials.

Main Methods:

  • Utilized a series of dialysis membranes with molecular weight cut-offs of 50, 25, 15, 8, and 2 kDa.
  • Applied dialysis to separate nanographene mixtures into distinct size fractions.

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Related Experiment Videos

Last Updated: Sep 24, 2025

Synthesis of Graphene Nanofluids with Controllable Flake Size Distributions
07:32

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Published on: July 17, 2019

6.8K
Fabricating Nanogaps by Nanoskiving
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Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
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Main Results:

  • Successfully separated nanographenes into five different size distributions.
  • The separated fractions exhibited controlled sizes, overcoming the limitations of broad distributions from top-down synthesis.

Conclusions:

  • Dialysis membrane separation offers a practical approach to size-fractionate nanographenes.
  • Size-controlled nanographenes are valuable starting materials for developing advanced carbon-based functional materials.