• 文献标题:   Characteristics of graphene-layer encapsulated nanoparticles fabricated using laser ablation method
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   OU Q, TANAKA T, MESKO A, OGINO A, NAGATSU M
  • 作者关键词:   cni nanoparticle, graphene layer, laser ablation, carbon nanotube, plasma cvd
  • 出版物名称:   DIAMOND RELATED MATERIALS
  • ISSN:   0925-9635 EI 1879-0062
  • 通讯作者地址:   Shizuoka Univ
  • 被引频次:   9
  • DOI:   10.1016/j.diamond.2007.10.023
  • 出版年:   2008

▎ 摘  要

Graphene layer-encapsulated Ni nanoparticles with diameters between 3 and 10 nm were fabricated by laser ablation techniques and deposited directly on the Si substrate at room temperature. It was found from the field-emission type scanning electron microscopy (FE-SEM) and transmission electron microscopy(TEM) analyses that any carbon nanotubes were not fabricated in the deposited nano-materials. High-resolution TEM observation showed the core-shell structure of Ni-C particles with crystalline nickel core surrounded by graphite-like layers. The X-ray diffraction(XRD) pattern also revealed that nanoparticles embedded in graphene capsules are crystalline nickel. With these Ni-C nanoparticles, we demonstrated the growth of vertically aligned carbon nanotubes with low spatial density on a silicon substrate by thermal CVD. (C) 2007 Elsevier B.V. All rights reserved.