Transformation of Round-shaped Graphene Disks into Hexagonal Domains in CVD

Authors

  • Lili Fan,

    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
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  • Xueliu Fan,

    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
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  • Jinquan Wei,

    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
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  • Kunlin Wang,

    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
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  • Dehai Wu,

    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
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  • Hongwei Zhu

    Corresponding author
    1. Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China)
    2. Center for Nano and Micro Mechanics (CNMM), Tsinghua University Beijing 100084 (China)
    • Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University Beijing 100084 (China).
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  • This work is supported by the National Science Foundation of China (50972067) and the Research Fund for Doctoral Program of Ministry of Education of China (20090002120019, 20090002120030).

Abstract

The CVD of graphene on metal substrates serves as an ideal platform for studying the nucleation and growth of two-dimensional crystals. In this paper, the size distribution and shape transformation of graphene domains at early stages of CVD are investigated. The transformation of round-shaped graphene disks into hexagonal domains during atmospheric pressure (AP)CVD on copper substrates is identified. The critical transformation size from graphene disks to hexagonal domains is ∼0.8 µm2 according to the size distribution statistics.

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