Self-condensation-assisted chemical vapour deposition growth of atomically two-dimensional MOF single-crystals

Lingxin Luo, Lingxiang Hou, Xueping Cui (), Pengxin Zhan, Ping He, Chuying Dai, Ruian Li, Jichen Dong, Ye Zou, Guoming Liu, Yanpeng Liu and Jian Zheng ()
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Lingxin Luo: Chinese Academy of Sciences
Lingxiang Hou: Chinese Academy of Sciences
Xueping Cui: Chinese Academy of Sciences
Pengxin Zhan: Chinese Academy of Sciences
Ping He: Chinese Academy of Sciences
Chuying Dai: Chinese Academy of Sciences
Ruian Li: Chinese Academy of Sciences
Jichen Dong: Chinese Academy of Sciences
Ye Zou: Chinese Academy of Sciences
Guoming Liu: Chinese Academy of Sciences
Yanpeng Liu: Nanjing University of Aeronautics and Astronautics
Jian Zheng: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Two-dimensional metal-organic frameworks (MOFs) have a wide variety of applications in molecular separation and other emerging technologies, including atomically thin electronics. However, due to the inherent fragility and strong interlayer interactions, high-quality MOF crystals of atomic thickness, especially isolated MOF crystal monolayers, have not been easy to prepare. Here, we report the self-condensation-assisted chemical vapour deposition growth of atomically thin MOF single-crystals, yielding monolayer single-crystals of poly[Fe(benzimidazole)2] up to 62 μm in grain sizes. By using transmission electron microscopy and high-resolution atomic force microscopy, high crystallinity and atomic-scale single-crystal structure are verified in the atomically MOF flakes. Moreover, integrating such MOFs with MoS2 to construct ultrathin van der Waals heterostructures is achieved by direct growth of atomically MOF single-crystals onto monolayer MoS2, and enables a highly selective ammonia sensing. These demonstrations signify the great potential of the method in facilitating the development of the fabrication and application of atomically thin MOF crystals.

Date: 2024
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DOI: 10.1038/s41467-024-48050-5

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