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Measurement of the intrinsic strength of crystalline and polycrystalline graphene

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  • Haider I. Rasool

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory (LBNL)
    University of California at Los Angeles (UCLA)
    California NanoSystems Institute (CNSI), University of California at Los Angeles)

  • Colin Ophus

    (National Center for Electron Microscopy (NCEM), Lawrence Berkeley National Laboratory (LBNL))

  • William S. Klug

    (California NanoSystems Institute (CNSI), University of California at Los Angeles
    University of California at Los Angeles (UCLA))

  • A. Zettl

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory (LBNL)
    Center of Integrated Nanomechanical Systems (COINS), University of California at Berkeley)

  • James K. Gimzewski

    (University of California at Los Angeles (UCLA)
    California NanoSystems Institute (CNSI), University of California at Los Angeles
    International Center for Materials Nanoarchitectonics (MANA))

Abstract

The mechanical properties of materials depend strongly on crystal structure and defect configuration. Here we measure the strength of suspended single-crystal and bicrystal graphene membranes prepared by chemical vapour deposition. Membranes of interest are first characterized by transmission electron microscopy and subsequently tested using atomic force microscopy. Single-crystal membranes prepared by chemical vapour deposition show strengths comparable to previous results of single-crystal membranes prepared by mechanical exfoliation. Grain boundaries with large mismatch angles in polycrystalline specimens have higher strengths than their low angle counterparts. Remarkably, these large angle grain boundaries show strength comparable to that of single-crystal graphene. To investigate this enhanced strength, we employ aberration-corrected high-resolution transmission electron microscopy to explicitly map the atomic-scale strain fields in suspended graphene. The high strength is attributed to the presence of low atomic-scale strain in the carbon–carbon bonds at the boundary.

Suggested Citation

  • Haider I. Rasool & Colin Ophus & William S. Klug & A. Zettl & James K. Gimzewski, 2013. "Measurement of the intrinsic strength of crystalline and polycrystalline graphene," Nature Communications, Nature, vol. 4(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3811
    DOI: 10.1038/ncomms3811
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    1. Josef Schätz & Navin Nayi & Jonas Weber & Christoph Metzke & Sebastian Lukas & Jürgen Walter & Tim Schaffus & Fabian Streb & Eros Reato & Agata Piacentini & Annika Grundmann & Holger Kalisch & Michael, 2024. "Button shear testing for adhesion measurements of 2D materials," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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