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<p>Compared with single-layer two-dimensional (2D) materials, bilayer, trilayer, and few-layer 2D materials exhibit enhanced band structure tunability, improved electrical and thermal properties, and superior mechanical strength and barrier performance. However, the layer-controlled synthesis of 2D films with high layer number uniformity remains challenging, due to the difficulty in the additional layer nucleation and the effective realization of layer-by-layer growth. Herein, we report an edge-feeding synchronous epitaxial growth mode breaking the limit of traditional epitaxy theories. An efficient heterogeneous Cu–Cu<sub>2</sub>O catalyst is demonstrated, where graphene edge-surrounding Cu<sub>2</sub>O is crucial in precursor dissociation, atomic carbon diffusion, and edge energy reduction. The synchronous growth method can be generalized to the layer-controlled synthesis of 2–7-layer graphene films. Relying on this growth strategy, we successfully achieved the industrial-scale production of homogeneous A3-sized ABA-trilayer graphene films (42 × 30 square centimeters) with good mechanical properties and peeling-transferring intactness. Our method offers a robust strategy for the layer-controlled synthesis of 2D material films.</p>

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Edge-feeding synchronous epitaxy of layer-controlled graphene films on heterogeneous catalytic substrates

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Buhang Chen,
  • Xiongzhi Zeng,
  • Zhetong Liu,
  • Wenlong Dong,
  • Ding Pei,
  • Huan Wang,
  • Yanyan Dong,
  • Chengjin Wu,
  • Xiaoyin Gao,
  • Hanbo Xiao,
  • Han Gao,
  • Hang Jia,
  • Aiheng Yuan,
  • Jinlong Du,
  • Heng Chen,
  • Haiyang Liu,
  • Congwei Tan,
  • Jianbo Yin,
  • Zhongkai Liu,
  • Luqi Liu,
  • Peng Gao,
  • Kostya S. Novoselov,
  • Hailin Peng,
  • Zhenyu Li,
  • Luzhao Sun,
  • Zhongfan Liu

摘要

Compared with single-layer two-dimensional (2D) materials, bilayer, trilayer, and few-layer 2D materials exhibit enhanced band structure tunability, improved electrical and thermal properties, and superior mechanical strength and barrier performance. However, the layer-controlled synthesis of 2D films with high layer number uniformity remains challenging, due to the difficulty in the additional layer nucleation and the effective realization of layer-by-layer growth. Herein, we report an edge-feeding synchronous epitaxial growth mode breaking the limit of traditional epitaxy theories. An efficient heterogeneous Cu–Cu2O catalyst is demonstrated, where graphene edge-surrounding Cu2O is crucial in precursor dissociation, atomic carbon diffusion, and edge energy reduction. The synchronous growth method can be generalized to the layer-controlled synthesis of 2–7-layer graphene films. Relying on this growth strategy, we successfully achieved the industrial-scale production of homogeneous A3-sized ABA-trilayer graphene films (42 × 30 square centimeters) with good mechanical properties and peeling-transferring intactness. Our method offers a robust strategy for the layer-controlled synthesis of 2D material films.