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Principles for fabricating moisture barrier films via stacked Janus graphene layers

Author

Listed:
  • Chaofan Zhou

    (Peking University)

  • Hongjie Gao

    (Peking University)

  • Saiyu Bu

    (Peking University)

  • Haotian Wu

    (Peking University
    Peking University
    Peking University)

  • Fan Liang

    (Peking University
    Guilin University of Electronic Technology)

  • Fangfang Li

    (Peking University
    Peking University
    Peking University)

  • Zhaoning Hu

    (Peking University
    Beijing Graphene Institute)

  • Yixuan Zhao

    (Peking University
    Beijing Graphene Institute)

  • Bingbing Guo

    (Beijing Graphene Institute)

  • Zelong Li

    (Beijing Graphene Institute)

  • Li Yin

    (Peking University)

  • Xiaokai Hu

    (Guilin University of Electronic Technology)

  • Qin Xie

    (Peking University
    Peking University
    Beijing Graphene Institute)

  • Yang Su

    (Tsinghua University)

  • Zhongfan Liu

    (Peking University
    Peking University
    Beijing Graphene Institute)

  • Li Lin

    (Peking University
    Peking University
    Peking University
    Beijing Graphene Institute)

Abstract

The excellent impermeability makes graphene film an ideal candidate for thin film encapsulation technology. However, current chemical vapor deposition (CVD) graphene-based barrier films can not provide sufficient moisture barrier performance, suggesting a lack of understanding in mechanism that dominates water diffusion in/through graphene stacks. Herein, we fabricate large-area graphene barrier films with a record-low water vapor transmission rate (WVTR) of 5 × 10−5 g/(m2·day), two orders of magnitude lower than previous works, in which two stacked Janus graphene films are intercalated by toluidine blue O (TBO) sub-monolayer: one side of graphene is decorated with fluorine- and oxygen-containing groups to allow crack-free transfer, while the other side is functionalized with hydroxyl groups to trap water. The intercalated TBO further blocks water transport due to a strong water-TBO interaction. Our work opens a route for surface/interface engineering of CVD graphene and promises its exciting future in the applications for advanced packaging.

Suggested Citation

  • Chaofan Zhou & Hongjie Gao & Saiyu Bu & Haotian Wu & Fan Liang & Fangfang Li & Zhaoning Hu & Yixuan Zhao & Bingbing Guo & Zelong Li & Li Yin & Xiaokai Hu & Qin Xie & Yang Su & Zhongfan Liu & Li Lin, 2025. "Principles for fabricating moisture barrier films via stacked Janus graphene layers," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58799-y
    DOI: 10.1038/s41467-025-58799-y
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    References listed on IDEAS

    as
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