Stamped production of single-crystal hexagonal boron nitride monolayers on various insulating substrates

Fankai Zeng, Ran Wang, Wenya Wei, Zuo Feng, Quanlin Guo, Yunlong Ren, Guoliang Cui, Dingxin Zou, Zhensheng Zhang, Song Liu, Kehai Liu, Ying Fu, Jinzong Kou, Li Wang, Xu Zhou, Zhilie Tang, Feng Ding, Dapeng Yu, Kaihui Liu () and Xiaozhi Xu ()
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Fankai Zeng: South China Normal University
Ran Wang: South China Normal University
Wenya Wei: South China Normal University
Zuo Feng: Peking University
Quanlin Guo: Peking University
Yunlong Ren: South China Normal University
Guoliang Cui: South China Normal University
Dingxin Zou: International Quantum Academy, Futian District
Zhensheng Zhang: International Quantum Academy, Futian District
Song Liu: International Quantum Academy, Futian District
Kehai Liu: Chinese Academy of Sciences
Ying Fu: Chinese Academy of Sciences
Jinzong Kou: South China Normal University
Li Wang: Chinese Academy of Sciences
Xu Zhou: South China Normal University
Zhilie Tang: South China Normal University
Feng Ding: Chinese Academy of Sciences
Dapeng Yu: International Quantum Academy, Futian District
Kaihui Liu: Peking University
Xiaozhi Xu: South China Normal University

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract Controllable growth of two-dimensional (2D) single crystals on insulating substrates is the ultimate pursuit for realizing high-end applications in electronics and optoelectronics. However, for the most typical 2D insulator, hexagonal boron nitride (hBN), the production of a single-crystal monolayer on insulating substrates remains challenging. Here, we propose a methodology to realize the facile production of inch-sized single-crystal hBN monolayers on various insulating substrates by an atomic-scale stamp-like technique. The single-crystal Cu foils grown with hBN films can stick tightly (within 0.35 nm) to the insulating substrate at sub-melting temperature of Cu and extrude the hBN grown on the metallic surface onto the insulating substrate. Single-crystal hBN films can then be obtained by removing the Cu foil similar to the stamp process, regardless of the type or crystallinity of the insulating substrates. Our work will likely promote the manufacturing process of fully single-crystal 2D material-based devices and their applications.

Date: 2023
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DOI: 10.1038/s41467-023-42270-x

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