Chirality-transferred epitaxy of circular polarization-sensitive ReS2 monolayer single crystals

Junjie Jiang, Xiao Wang, Danyang Wang, Yue Chai, Yue Yang, Lingtong Ding, Xiao Guo, Aolin Li, Tao Xu, Han Huang, Shen Zhou, Zheng Luo, Jin Zhang, Fangping Ouyang (), Feng Ding (), Zhu-Jun Wang () and Shanshan Wang ()
Additional contact information
Junjie Jiang: Peking University Shenzhen Graduate School
Xiao Wang: Chinese Academy of Sciences
Danyang Wang: National University of Defense Technology
Yue Chai: ShanghaiTech University
Yue Yang: ShanghaiTech University
Lingtong Ding: Chinese Academy of Sciences
Xiao Guo: Central South University
Aolin Li: Xinjiang University
Tao Xu: Central South University
Han Huang: Central South University
Shen Zhou: National University of Defense Technology
Zheng Luo: National University of Defense Technology
Jin Zhang: Peking University Shenzhen Graduate School
Fangping Ouyang: Central South University
Feng Ding: Chinese Academy of Sciences
Zhu-Jun Wang: ShanghaiTech University
Shanshan Wang: Peking University Shenzhen Graduate School

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract The epitaxial growth of semiconducting two-dimensional (2D) materials is vital to achieve wafer-scale single-crystalline films for beyond-silicon electronics. However, gaining full control over both in-plane and out-of-plane orientations (i.e., lateral crystal alignments and chirality) is particularly challenging when growing low-symmetry 2D single crystals. Here, using triclinic ReS2 semiconductor monolayers as a model system, we demonstrate the chirality-controlled epitaxial growth of unidirectional, anisotropic single crystals on an insulating chiral surface via the synergy of terraces, steps, and kinks, yielding >97.5% chirality selectivity and >99% in-plane orientation consistency. The products display an anisotropic ratio of 1.9 in photodetection (comparable to exfoliated samples) and high distinguishability of circularly polarized light. Theoretical calculations combined with a set of microscopy and spectroscopy methods show that terrace facets determine the epitaxial growth direction, while steps and kinks break the degeneracy of ReS2 in the lateral orientation and chirality. This approach is also applicable to the chiral epitaxy of other low-symmetry 2D single crystals, like monoclinic MoO2. Our method extends the range of control over 2D material growth, enabling chirality transfer from the substrate to the crystal, and promotes the large-area synthesis of chirality-selected, single-crystal 2D materials.

Date: 2025
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DOI: 10.1038/s41467-025-61849-0

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