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Indentation of graphene nano-bubbles

Journal Contribution - Journal Article

Molecular dynamics simulations are used to investigate the effect of an AFM tip when indenting graphene nano bubbles filled by a noble gas (i.e. He, Ne and Ar) up to the breaking point. The failure points resemble those of viral shells as described by the Foppl-von Karman (FvK) dimensionless number defined in the context of elasticity theory of thin shells. At room temperature, He gas inside the bubbles is found to be in the liquid state while Ne and Ar atoms are in the solid state although the pressure inside the nano bubble is below the melting pressure of the bulk. The trapped gases are under higher hydrostatic pressure at low temperatures than at room temperature.
Journal: Nanoscale
ISSN: 2040-3364
Volume: 14
Pages: 5876 - 5883
Publication year:2022
Keywords:A1 Journal article
Accessibility:Embargoed
Embargoed until:01/10/2022