In-situ observation of graphene growth on Ni(111)

Genki Odahara, Shigeki Otani, Chuhei Oshima, Masahiko Suzuki, Tsuneo Yasue, Takanori Koshikawa

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Graphene growth of mono-, bi- and tri-layers on Ni(111) through surface segregation was observed in situ by low energy electron microscopy. The carbon segregation was controlled by adjusting substrate temperature from 1200 K to 1050 K. After the completion of the first layer at 1125 K, the second layer grew at the interface between the first-layer and the substrate at 1050 K. The third layer also started to grow at the same temperature, 1050 K. All the layers exhibited a 1 × 1 atomic structure. The edges of the first-layer islands were straight lines, reflecting the hexagonal atomic structure. On the other hand, the shapes of the second-layer islands were dendritic. The edges of the third-layer islands were again straight lines similar to those of the first-layer islands. The phenomena presumably originate from the changes of interfacial-bond strength of the graphene to Ni substrate depending on the graphene thickness. No nucleation site of graphene layers was directly observed. All the layers expanded out of the field of view and covered the surface. The number of nucleation sites is extremely small on Ni(111) surface. This finding might open the way to grow the high quality, single-domain graphene crystals.

Original languageEnglish
Pages (from-to)1095-1098
Number of pages4
JournalSurface Science
Volume605
Issue number11-12
DOIs
Publication statusPublished - 2011 Jun

Keywords

  • Graphene
  • Low energy electron microscopy
  • Ni(111)
  • Surface segregation

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'In-situ observation of graphene growth on Ni(111)'. Together they form a unique fingerprint.

  • Cite this

    Odahara, G., Otani, S., Oshima, C., Suzuki, M., Yasue, T., & Koshikawa, T. (2011). In-situ observation of graphene growth on Ni(111). Surface Science, 605(11-12), 1095-1098. https://doi.org/10.1016/j.susc.2011.03.011