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Related Experiment Video

Updated: Jun 4, 2025

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
10:41

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol

Published on: December 20, 2016

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Two-dimensional Nanosheets by Liquid Metal Exfoliation.

Yichao Bai1, Youan Xu2, Linxuan Sun1

  • 1Institute of Materials Research, Center of Double Helix, Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials, Shenzhen Key Laboratory of Advanced Layered Materials for Value-added Applications, Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|December 21, 2024
PubMed

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Summary

Liquid metal gallium (Ga) offers a novel method for creating high-quality, surfactant-free 2D nanosheets from various layered materials. This technique minimizes defects and contamination, enabling tailored properties for advanced applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Liquid exfoliation is a common method for synthesizing 2D nanosheets (NSs).
  • This method often results in contamination and defects in the synthesized NSs.
  • Controlling the properties of 2D materials is crucial for their practical applications.

Purpose of the Study:

  • To develop a new method for synthesizing high-quality 2D nanosheets (NSs).
  • To utilize liquid metal gallium (Ga) for exfoliating bulk layered materials.
  • To achieve phase transformation and customize defect levels in 2D NSs.

Main Methods:

  • Liquid metal exfoliation using gallium (Ga) at near room temperature.
  • Utilizing liquid surface tension and Ga intercalation to overcome Van der Waals (vdW) forces.
Keywords:
2D nanosheetsliquid metalno additional defects introduceduniversal exfoliation

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Last Updated: Jun 4, 2025

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  • Separating Ga using ethanol dispersion to prevent contamination and defects.

    • Main Results:

    • Production of high aspect ratio, surfactant-free 2D NSs from over 10 types of materials (e.g., h-BN, graphene, MoTe2, MoSe2).
    • Transformation of 2H-phase transition metal dichalcogenides to 1T'-phase under ambient conditions.
    • Customization of 2D NS metallicity and defectiveness by adjusting initial material defect levels.

    Conclusions:

    • The liquid metal gallium exfoliation method provides high-quality, defect-minimized 2D NSs.
    • This approach enables phase control and property customization for diverse applications.
    • The method offers a strategy for optimizing liquid metal/2D interfaces, preserving intrinsic properties for optics and energy conversion.