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Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene.

Dang Du Nguyen1, TaeGyeong Lim1, Soomook Lim1

  • 1School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, Korea.

Nanomaterials (Basel, Switzerland)
|April 3, 2021
PubMed
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Researchers measured the interlayer separation energy of graphene paper using double cantilever beam tests. This fundamental property is crucial for developing robust graphene-based devices for various applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Mechanical Engineering

Background:

  • Graphene paper, composed of stacked graphene flakes, is vital for energy storage, desalination, and actuators.
  • Understanding graphene paper's mechanical, electrical, and thermal properties is key for device fabrication.
  • Interlayer interactions significantly influence the performance and integrity of graphene-based materials.

Purpose of the Study:

  • To investigate the interlayer interactions within graphene paper.
  • To quantify the interfacial properties of graphene paper using fracture mechanics.
  • To provide fundamental data for designing mechanically robust paper-based devices.

Main Methods:

  • Fabrication of graphene paper via flow-directed stacking of electrochemically exfoliated few-layer graphene flakes.
Keywords:
double cantilever beamelectrochemical exfoliationfracturegraphene paperinterlayer separation

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  • Utilization of double cantilever beam (DCB) fracture tests to analyze interlayer delamination.
  • Measurement of force-displacement responses during the mechanical separation of graphene paper.

    • Main Results:

    • The double cantilever beam (DCB) fracture tests provided detailed force-displacement data.
    • Fracture mechanics analysis revealed the interlayer separation energy of the graphene paper.
    • The quantified interlayer separation energy was determined to be 9.83 ± 0.06 J/m².

    Conclusions:

    • The study provides a fundamental understanding of the interfacial properties of graphene paper.
    • The quantified interlayer separation energy is essential for predicting and improving mechanical integrity.
    • These findings will aid in the development of advanced graphene-based devices with enhanced durability and performance.