中国物理B ›› 2019, Vol. 28 ›› Issue (2): 28102-028102.doi: 10.1088/1674-1056/28/2/028102

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Superlubricity enabled dry transfer of non-encapsulated graphene

Zhe Ying(应哲), Aolin Deng(邓奥林), Bosai Lyu(吕博赛), Lele Wang(王乐乐), Takashi Taniguchi, Kenji Watanabe, Zhiwen Shi(史志文)   

  1. 1 Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China;
    3 National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • 收稿日期:2018-12-11 修回日期:2018-12-16 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: Zhiwen Shi E-mail:zwshi@sjtu.edu.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302001) and the National Natural Science Foundation of China (Grant Nos. 11574204 and 11774224).

Superlubricity enabled dry transfer of non-encapsulated graphene

Zhe Ying(应哲)1,2, Aolin Deng(邓奥林)1,2, Bosai Lyu(吕博赛)1,2, Lele Wang(王乐乐)1,2, Takashi Taniguchi3, Kenji Watanabe3, Zhiwen Shi(史志文)1,2   

  1. 1 Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China;
    3 National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
  • Received:2018-12-11 Revised:2018-12-16 Online:2019-02-05 Published:2019-02-05
  • Contact: Zhiwen Shi E-mail:zwshi@sjtu.edu.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302001) and the National Natural Science Foundation of China (Grant Nos. 11574204 and 11774224).

摘要:

Transferring high-quality exfoliated graphene flakes onto different substrates while keeping the graphene free of polymer residues is of great importance, but at the same time very challenging. Currently, the only feasible way is the so-called all-dry “pick-and-lift” method, in which a hexagonal boron nitride (hBN) flake is employed to serve as a stamp to pick up graphene from one substrate and to lift it down onto another substrate. The transferred graphene samples, however, are always covered or encapsulated by hBN flakes, which leads to difficulties in further characterizations. Here, we report an improved “pick-and-lift” method, which allows ultra-clean graphene flakes to be transferred onto a variety of substrates without hBN coverage. Basically, by exploiting the superlubricity at the graphene/hBN stack interface, we are able to remove the top-layer hBN stamp by applying a tangential force and expose the underneath graphene.

关键词: superlubricity, transfer, graphene, heterostructures

Abstract:

Transferring high-quality exfoliated graphene flakes onto different substrates while keeping the graphene free of polymer residues is of great importance, but at the same time very challenging. Currently, the only feasible way is the so-called all-dry “pick-and-lift” method, in which a hexagonal boron nitride (hBN) flake is employed to serve as a stamp to pick up graphene from one substrate and to lift it down onto another substrate. The transferred graphene samples, however, are always covered or encapsulated by hBN flakes, which leads to difficulties in further characterizations. Here, we report an improved “pick-and-lift” method, which allows ultra-clean graphene flakes to be transferred onto a variety of substrates without hBN coverage. Basically, by exploiting the superlubricity at the graphene/hBN stack interface, we are able to remove the top-layer hBN stamp by applying a tangential force and expose the underneath graphene.

Key words: superlubricity, transfer, graphene, heterostructures

中图分类号:  (Graphene)

  • 81.05.ue
68.35.Af (Atomic scale friction) 78.66.-w (Optical properties of specific thin films)