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Updated: Jul 2, 2025

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
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Graphene exfoliation using multidomain peptides.

Ruitao Jin1, Nermina Brljak2,3, Joseph M Slocik4

  • 1Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia. tiffany.walsh@deakin.edu.au.

Journal of Materials Chemistry. B
|February 27, 2024
PubMed
Summary
This summary is machine-generated.

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A novel peptide, BEAM, effectively exfoliates graphene nanosheets in water using sonication. This biomolecule also stabilizes the exfoliated sheets, paving the way for new 2D material applications.

Area of Science:

  • Materials Science
  • Biochemistry
  • Nanotechnology

Background:

  • Liquid-phase exfoliation of 2D materials in water is crucial for scalable applications.
  • Biomolecules offer a sustainable route for exfoliating materials like graphene.
  • Previous peptides demonstrated exfoliation capabilities but lacked multi-material functionality.

Purpose of the Study:

  • To investigate the efficacy of a novel peptide, BEAM, for exfoliating graphene.
  • To evaluate the colloidal stability of graphene nanosheets exfoliated by BEAM.
  • To explore the potential of BEAM for creating 2D material heterostructures.

Main Methods:

  • Synthesis of the biomolecular exfoliant and assembly motif (BEAM) peptide.
  • Liquid-phase exfoliation of graphite using BEAM under sonication in aqueous solution.

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  • Molecular dynamics simulations to analyze exfoliation and stability.
  • Characterization of exfoliated graphene nanosheets.

    • Main Results:

    • BEAM peptide successfully exfoliates graphene sheets from bulk graphite in aqueous media.
    • Molecular dynamics simulations confirm BEAM's ability to facilitate exfoliation and maintain colloidal stability.
    • The dual-functional nature of BEAM (graphene and h-BN binding) is highlighted.

    Conclusions:

    • BEAM peptide is an effective agent for aqueous exfoliation and stabilization of graphene.
    • This research enables the design of multi-functional molecules for 2D material processing.
    • Findings support the creation of 2D material heterostructures under ambient aqueous conditions.