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- Title
Strain-driven growth of ultra-long two-dimensional nano-channels.
- Authors
Zhu, Chao; Yu, Maolin; Zhou, Jiadong; He, Yongmin; Zeng, Qingsheng; Deng, Ya; Guo, Shasha; Xu, Mingquan; Shi, Jinan; Zhou, Wu; Sun, Litao; Wang, Lin; Hu, Zhili; Zhang, Zhuhua; Guo, Wanlin; Liu, Zheng
- Abstract
Lateral heterostructures of two-dimensional transition metal dichalcogenides (TMDs) have offered great opportunities in the engineering of monolayer electronics, catalysis and optoelectronics. To explore the full potential of these materials, developing methods to precisely control the spatial scale of the heterostructure region is crucial. Here, we report the synthesis of ultra-long MoS2 nano-channels with several micrometer length and 2–30 nanometer width within the MoSe2 monolayers, based on intrinsic grain boundaries (GBs). First-principles calculations disclose that the strain fields near the GBs not only lead to the preferred substitution of selenium by sulfur but also drive coherent extension of the MoS2 channel from the GBs. Such a strain-driven synthesis mechanism is further shown applicable to other topological defects. We also demonstrate that the spontaneous strain of MoS2 nano-channels can further improve the hydrogen production activity of GBs, paving the way for designing GB based high-efficient TMDs in the catalytic application. Controlled growth of heterostructures within 10 nm scale is crucial for potential applications of transition metal dichalcogenides. Here, the authors report strain-driven synthesis of ultra-long MoS2 nano-channels having several micrometers length and 2–30 nm width embedded within MoSe2 monolayer.
- Subjects
SELENIUM; TRANSITION metals; ELECTRONICS engineers; CRYSTAL grain boundaries; HYDROGEN production; HYDROGEN evolution reactions; MONOMOLECULAR films
- Publication
Nature Communications, 2020, Vol 11, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-020-14521-8