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Detection of graphene domains and defects using liquid crystals

Author

Listed:
  • Jong-Ho Son

    (Pohang University of Science and Technology)

  • Seung-Jae Baeck

    (School of Electrical & Electronic Engineering, Yonsei University)

  • Min-Ho Park

    (School of Advanced Materials Science and Engineering, Sungkyunkwan University)

  • Jae-Bok Lee

    (School of Electrical & Electronic Engineering, Yonsei University)

  • Cheol-Woong Yang

    (School of Advanced Materials Science and Engineering, Sungkyunkwan University)

  • Jang-Kun Song

    (School of Electronics & Electrical Engineering, Sungkyunkwan University)

  • Wang-Cheol Zin

    (Pohang University of Science and Technology)

  • Jong-Hyun Ahn

    (School of Electrical & Electronic Engineering, Yonsei University)

Abstract

The direct observation of the domain size and defect distribution in a graphene film is important for the development of electronic applications involving graphene. Here we report a promising method for observing graphene domains grown by chemical vapour deposition. The unavoidable development of crack or pinhole defects during the growth and transfer processes is visualized using a liquid crystal layer. Liquid crystal molecules align anisotropically with respect to the graphene domains and exhibit distinct birefringence properties that can be used to image the graphene domains. This approach is useful for visualizing the crack distributions and their generation process in graphene films under external strain. This type of simple observation method provides an effective route to evaluating the quality and reliability of graphene sheets for use in various electronic devices.

Suggested Citation

  • Jong-Ho Son & Seung-Jae Baeck & Min-Ho Park & Jae-Bok Lee & Cheol-Woong Yang & Jang-Kun Song & Wang-Cheol Zin & Jong-Hyun Ahn, 2014. "Detection of graphene domains and defects using liquid crystals," Nature Communications, Nature, vol. 5(1), pages 1-7, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4484
    DOI: 10.1038/ncomms4484
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    Cited by:

    1. Dan-Qing Liu & Minkyung Kang & David Perry & Chang-Hui Chen & Geoff West & Xue Xia & Shayantan Chaudhuri & Zachary P. L. Laker & Neil R. Wilson & Gabriel N. Meloni & Marko M. Melander & Reinhard J. Ma, 2021. "Adiabatic versus non-adiabatic electron transfer at 2D electrode materials," Nature Communications, Nature, vol. 12(1), pages 1-11, December.

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