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Bioinspired Supertough Graphene Fiber through Sequential Interfacial Interactions.

Yuanyuan Zhang1, Jingsong Peng1, Mingzhu Li2

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Inspired by natural nacre, researchers developed supertough graphene-based nanocomposite fibers (BGNFs) using ionic and π-π interactions. These BGNFs offer high strength, toughness, and stable electrical conductivity for advanced devices.

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bioinspiredgraphene fibersinterfacial interactionssequentialtough

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomimetics

Background:

  • Natural nacre displays remarkable strength and toughness due to its hierarchical structure and synergistic interfaces.
  • Understanding nacre's structure-property relationships is key to designing advanced materials.

Purpose of the Study:

  • To create supertough bioinspired graphene-based nanocomposite fibers (BGNFs) mimicking nacre's design principles.
  • To investigate the mechanical and electrical properties of the synthesized BGNFs.

Main Methods:

  • Fabrication of BGNFs under room temperature using sequential ionic bonding and π-π interactions.
  • Characterization of the BGNFs' tensile strength, toughness, and electrical conductivity.

Main Results:

  • Achieved super toughness of 18.7 MJ m⁻³ and high tensile strength of 740.1 MPa.
  • Demonstrated high electrical conductivity (384.3 S cm⁻¹) with remarkable stability (>80% after 1000 cycles).

Conclusions:

  • The bioinspired BGNFs exhibit superior mechanical and electrical properties, emulating natural nacre.
  • These BGNFs are promising for flexible and stable electrical devices like strain sensors and actuators.