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Tunable Interlayer Interactions in Reduced Graphene Oxide Paper.

Dang Du Nguyen1, Yonas Tsegaye Megra1,2, TaeGyeong Lim1

  • 1School of Mechanical Engineering, Sungkyunkwan University, Suwon16419, Gyeonggi-do, Republic of Korea.

ACS Applied Materials & Interfaces
|January 26, 2023
PubMed
Summary
This summary is machine-generated.

Researchers measured the interlayer cohesion energy in graphene paper, finding it tunable via chemical reduction. This work characterizes graphene paper

Keywords:
cohesion energygraphene oxidegraphene paperinterlayer separationreduced graphene oxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Mechanical Engineering

Background:

  • Graphene-based paper-like materials offer tunable properties and unique structures.
  • Understanding graphene sheet interactions is crucial for material properties and applications.

Purpose of the Study:

  • To investigate and characterize the interlayer cohesion energies in free-standing graphene papers.
  • To establish the tunability of interlayer interactions through chemical modification.

Main Methods:

  • Utilized the mode I fracture concept with double cantilever beam specimens for mechanical separation.
  • Analyzed interlayer bonding strength by mechanically separating graphene paper along its thickness.
  • Employed chemical reduction with hydroiodic acid on graphene oxide paper.

Main Results:

  • Interlayer cohesion energy was tuned from 11.30 ± 0.25 to 4.78 ± 0.18 J/m² with increasing reduction time.
  • A correlation was found between cohesion energy, oxygen content, interlayer spacing, and electrical conductivity.
  • Demonstrated the mechanical characterization of interlayer cohesion energy in graphene paper.

Conclusions:

  • The study provides fundamental characterization of interlayer cohesion energy in graphene paper.
  • Established that interlayer interactions in graphene paper are tunable.
  • Highlights the potential for tailored material properties through controlled reduction.