• 文献标题:   Au nanocluster growth on Graphene supported on Ni(111)
  • 文献类型:   Article
  • 作  者:   YARMOFF JA, SALVO C
  • 作者关键词:  
  • 出版物名称:   SURFACE SCIENCE
  • ISSN:   0039-6028 EI 1879-2758
  • 通讯作者地址:   Univ Calif Riverside
  • 被引频次:   0
  • DOI:   10.1016/j.susc.2018.11.014
  • 出版年:   2019

▎ 摘  要

Low energy alkali ion scattering is used to investigate the deposition of Au onto a single layer of graphene grown onto Ni(111) by chemical vapor deposition. The yield of 3.0 keV Na+ singly scattered from Au as a function of coverage indicates that it grows in a Volmer-Weber mode forming nanoclusters that increase in size with the amount of deposition. The neutralization probability of the scattered Na+ is high for the smallest clusters and decreases as they increase in size. This is presumably caused by the cluster edge atoms being positively charged combined with the fact that the ratio of edge to center atoms decreases with size, which is similar to the behavior of Au nanoclusters on oxide substrates. In addition, oxygen is intercalated under the graphene film to decouple it from the substrate, but no changes in the growth mode or neutralization probability are observed.