<i>In-situ</i> Optical Microscopy of Crystal Growth of Graphene Using Thermal Radiation

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  • TERASAWA Tomo-o
    Japan Atomic Energy Agency, Advanced Science Research Center The University of Tokyo, Graduate School of Frontier Science
  • TAIRA Takanobu
    The University of Tokyo, School of Science
  • OBATA Seiji
    The University of Tokyo, Graduate School of Frontier Science
  • SAIKI Koichiro
    The University of Tokyo, Graduate School of Frontier Science The University of Tokyo, School of Science
  • YASUDA Satoshi
    Japan Atomic Energy Agency, Advanced Science Research Center
  • ASAOKA Hidehito
    Japan Atomic Energy Agency, Advanced Science Research Center

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Other Title
  • グラフェンの結晶成長の熱放射光によるその場顕微観察
  • グラフェン ノ ケッショウ セイチョウ ノ ネツ ホウシャコウ ニ ヨル ソノ ジョウケンビカンサツ

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Abstract

<p>Graphene, an atomically thin sheet composed of sp2 carbon atoms, has been the most attractive material in this decade. The fascinating properties of graphene are exhibited when it is monolayer. Chemical vapor deposition (CVD) is widely used to produce monolayer graphene selectively in large-area. Here we introduce “radiation-mode optical microscopy” which we have developed in order to realize the in-situ observation of the CVD growth of graphene. We show the method to observe graphene as bright contrast on Cu substrates in thermal radiation images. The growth mechanism, the nucleation site and rate limiting process, revealed by the in-situ observation is presented. Finally, we show the CVD growth of graphene on Au substrates, resulting in the tuning of the emissivity of graphene by the pre-treatment procedures. Our method is not only a way to observe the graphene growth but also shed light on the thermal radiation property of graphene.</p>

Journal

  • Vacuum and Surface Science

    Vacuum and Surface Science 62 (10), 629-634, 2019-10-10

    The Japan Society of Vacuum and Surface Science

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