空位缺陷
石墨烯
分子动力学
电子束处理
辐照
材料科学
化学物理
晶体缺陷
电子
石墨烯纳米带
原子物理学
分子物理学
纳米技术
化学
结晶学
计算化学
物理
量子力学
核物理学
作者
M. Yamamoto,Yoshiki Asayama,Masaaki Yasuda,Hiroaki Kawata,Yoshihiko Hirai
出处
期刊:Journal of vacuum science and technology
[American Vacuum Society]
日期:2014-10-08
卷期号:32 (6)
被引量:6
摘要
Molecular dynamics simulations were performed to study defect formation and transformation in graphene under electron irradiation. The single-vacancy was the most frequently formed defect and the number of defects did not depend on the defect formation energy for normal incidence. The single-vacancy transformed to other types of defects and migrated in graphene by heating. The recovery energies of adatom-vacancy and pentagon–heptagon defects were relatively small. The Stone–Wales defect was the most stable, and did not easily recover. In the single atomic chain formation process from graphene by electron irradiation, competition between defect formation by electron collision and the recovery by heating was observed.
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