• 文献标题:   Indentation of graphene nano-bubbles
  • 文献类型:   Article
  • 作  者:   FARAJI F, NEEKAMAL M, NEYTS EC, PEETERS FM
  • 作者关键词:  
  • 出版物名称:   NANOSCALE
  • ISSN:   2040-3364 EI 2040-3372
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1039/d2nr01207c EA MAR 2022
  • 出版年:   2022

▎ 摘  要

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.