Large hexagonal bi- and trilayer graphene single crystals with varied interlayer rotations

Zheng Yan, Yuanyue Liu, Long Ju, Zhiwei Peng, Jian Lin, Gunuk Wang, Haiqing Zhou, Changsheng Xiang, E. L.G. Samuel, Carter Kittrell, Vasilii I. Artyukhov, Feng Wang, Boris I. Yakobson, James M. Tour

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Bi- and trilayer graphene have attracted intensive interest due to their rich electronic and optical properties, which are dependent on interlayer rotations. However, the synthesis of high-quality large-size bi- and trilayer graphene single crystals still remains a challenge. Here, the synthesis of 100 μm pyramid-like hexagonal bi- and trilayer graphene single-crystal domains on Cu foils using chemical vapor deposition is reported. The as-produced graphene domains show almost exclusively either 0° or 30° interlayer rotations. Raman spectroscopy, transmission electron microscopy, and Fourier-transformed infrared spectroscopy were used to demonstrate that bilayer graphene domains with 0° interlayer stacking angles were Bernal stacked. Based on first-principle calculations, it is proposed that rotations originate from the graphene nucleation at the Cu step, which explains the origin of the interlayer rotations and agrees well with the experimental observations. Carbon materials: The synthesis of 100 μm pyramid-like bi- and trilayer graphene domains deposited on copper foils with hexagonal shape is reported (see picture). The produced graphene domains show almost exclusively either 0° or 30° interlayer rotations. First-principle calculations show that the rotations can originate from the graphene nucleation at a copper step.

Original languageEnglish
Pages (from-to)1565-1569
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number6
DOIs
Publication statusPublished - 2014 Feb 3
Externally publishedYes

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Keywords

  • first-principle calculations
  • graphene
  • growth mechanism
  • single crystals
  • surface chemistry

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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