Fail-safe design of devices requires robust integrity assessment procedures which are still absent for 2D materials, hence affecting transfer to applications. Here, a combined on-chip tension and cracking method, and associated data reduction scheme have been developed to determine the fracture toughness and strength of monolayer-monodomain-freestanding graphene. Myriads of specimens are generated providing statistical data. The crack arrest tests provide a definitive fracture toughness of 4.4 MPa m . Tension on-chip provides Young's modulus of 950 GPa, fracture strain of 11%, and tensile strength up to 110 GPa, reaching a record of stored elastic energy ~6 GJ m-3 as confirmed by thermodynamics and quantized fracture mechanics. A ~ 1.4 nm crack size is often found responsible for graphene failure, connected to 5-7 pair defects. Micron-sized graphene membranes and smaller can be produced defect-free, and design rules can be based on 110 GPa strength. For larger areas, a fail-safe design should be based on a maximum 57 GPa strength.

Definitive Engineering Strength and Fracture Toughness of Graphene through On-Chip Nanomechanics / Jaddi, Sahar; Malik, M. Wasil; Wang, Bin; Pugno, Nicola M.; Zeng, Yun; Coulombier, Michael; Raskin, Jean-Pierre; Pardoen, Thomas. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 2024, 15:1(2024), pp. 1-11. [10.1038/s41467-024-49426-3]

Definitive Engineering Strength and Fracture Toughness of Graphene through On-Chip Nanomechanics

Pugno, Nicola M.;
2024-01-01

Abstract

Fail-safe design of devices requires robust integrity assessment procedures which are still absent for 2D materials, hence affecting transfer to applications. Here, a combined on-chip tension and cracking method, and associated data reduction scheme have been developed to determine the fracture toughness and strength of monolayer-monodomain-freestanding graphene. Myriads of specimens are generated providing statistical data. The crack arrest tests provide a definitive fracture toughness of 4.4 MPa m . Tension on-chip provides Young's modulus of 950 GPa, fracture strain of 11%, and tensile strength up to 110 GPa, reaching a record of stored elastic energy ~6 GJ m-3 as confirmed by thermodynamics and quantized fracture mechanics. A ~ 1.4 nm crack size is often found responsible for graphene failure, connected to 5-7 pair defects. Micron-sized graphene membranes and smaller can be produced defect-free, and design rules can be based on 110 GPa strength. For larger areas, a fail-safe design should be based on a maximum 57 GPa strength.
2024
1
Jaddi, Sahar; Malik, M. Wasil; Wang, Bin; Pugno, Nicola M.; Zeng, Yun; Coulombier, Michael; Raskin, Jean-Pierre; Pardoen, Thomas
Definitive Engineering Strength and Fracture Toughness of Graphene through On-Chip Nanomechanics / Jaddi, Sahar; Malik, M. Wasil; Wang, Bin; Pugno, Nicola M.; Zeng, Yun; Coulombier, Michael; Raskin, Jean-Pierre; Pardoen, Thomas. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 2024, 15:1(2024), pp. 1-11. [10.1038/s41467-024-49426-3]
File in questo prodotto:
File Dimensione Formato  
637-NATCOMMUN-Definitive_engineering_strength.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 3.41 MB
Formato Adobe PDF
3.41 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/419090
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
  • OpenAlex ND
social impact