• 文献标题:   Physical mechanism of swift heavy ion irradiation effect in graphene
  • 文献类型:   Article
  • 作  者:   ZHAO DD, WANG Q, DING J
  • 作者关键词:   singlelayer graphene, swift heavy ion, molecular dynamic
  • 出版物名称:   RADIATION EFFECTS DEFECTS IN SOLIDS
  • ISSN:   1042-0150 EI 1029-4953
  • 通讯作者地址:   Jiangsu Second Normal Univ
  • 被引频次:   1
  • DOI:   10.1080/10420150.2019.1627545 EA JUN 2019
  • 出版年:   2019

▎ 摘  要

The damage production induced by swift heavy ion irradiation in single-layer graphene (SLG) is investigated by molecular dynamics method. By given energy to a cylindrical region, the latent track consisting of nanopore and non-six-member rings can be produced, which depends on the electronic energy loss (dE/dx). For SLG, the minimum value needed to generate defects lies in 6.5-10 keV/nm. The latent track formation begins with the decomposition of the structure in energy deposition region until the atomic fragments escape from the surface and gradually decompose into atomic clusters. At the same time, the structure of system also changes. The source power of this phenomena is the accumulation and outward propagation of atomic stress in energy deposition region.