How the orientation of graphene is determined during chemical vapor deposition growth

Xiuyun Zhang, Ziwei Xu, Li Hui, John Haozhong Xin, Feng Ding

Research output: Journal article publicationJournal articleAcademic researchpeer-review

73 Citations (Scopus)

Abstract

We present a theoretical study on the determination of graphene orientation on the catalyst surface in chemical vapor deposition growth. Our study reveals that the interaction between the graphene wall and catalyst surface is weak and not sensitive to the orientation of graphene. The graphene edge-catalyst interaction is strong and sensitively depends on the graphene orientation. Therefore, the graphene edge-catalyst interaction is responsible for the orientation determination of a small graphene island in the early stage of graphene growth, and such an orientation can be inherited by the matured graphene due to the high barrier of graphene island rotation. On the basis of the mechanism of graphene orientation determination, various controversial-like experimental puzzles have been well-explained, and a potential of synthesizing large-area single-crystalline graphene on either single-crystalline or polycrystalline catalyst surfaces is revealed.
Original languageEnglish
Pages (from-to)2822-2827
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume3
Issue number19
DOIs
Publication statusPublished - 4 Oct 2012

ASJC Scopus subject areas

  • Materials Science(all)

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