Controllable Synthesis of WSe<sub>2</sub>–WS<sub>2</sub> Lateral Heterostructures via Atomic Substitution
The atomic substitution in two-dimensional (2D) materials is propitious to achieving compositionally engineered semiconductor heterostructures. However, elucidating the mechanism and developing methods to synthesize 2D heterostructures with atomic-scale precision are crucial. Here, we demonstrate the synthesis of monolayer WSe<sub>2</sub>-WS<sub>2</sub> heterostructures with a relatively sharp interface from monolayer WSe<sub>2</sub> using a chalcogen atom-exchange synthesis route at high temperatures for short periods. The substitution was initiated at the edges of monolayer WSe<sub>2</sub> and the lateral diffuse along the heterointerface, and the reaction can be controlled by the precise reaction time and temperature. The lateral heterostructure and substitution process are studied by Raman and photoluminescence (PL) spectroscopies, electron microscopy, and device characterization, revealing a possible mechanism of strain-induced transformation. Our findings demonstrate a highly controllable synthesis of 2D layered materials through atom substitutional chemistry and provide a simple route to control the atomic structure.
Authors
- Xidong Duan (ORCID: https://orcid.org/0000-0002-4951-901X)
- Yang Xiang-Dong (ORCID: https://orcid.org/0000-0002-0797-8293)
- Xiaoming Zheng (ORCID: https://orcid.org/0000-0001-7847-9793)
- Zhikang Ao
- Shunhui Zhang
- Mianzeng Zhong (ORCID: https://orcid.org/0000-0003-0343-5248)
- Jia Li (ORCID: https://orcid.org/0000-0001-9361-2281)
- Xiangzhe Zhang (ORCID: https://orcid.org/0000-0002-1543-6048)
- Huifang Ma (ORCID: https://orcid.org/0000-0002-5196-6935)
- Jun He (ORCID: https://orcid.org/0000-0001-7062-4001)
- Hang Liu (ORCID: https://orcid.org/0000-0001-5970-3403)
- Tian Zhang (ORCID: https://orcid.org/0000-0002-9891-7399)
- Bo Li (ORCID: https://orcid.org/0000-0002-5802-7519)
- Zhengwei Zhang (ORCID: https://orcid.org/0000-0002-6239-9331)
- Lan Xiang (ORCID: https://orcid.org/0000-0001-5947-0507)
- Fen Zhang (ORCID: https://orcid.org/0009-0000-9423-7268)
- Baihui Zhang (ORCID: https://orcid.org/0009-0008-1473-2276)
- Xuyang Zhang
Institutions
- ON Semiconductor (United States) (US)
- Hunan University of Science and Technology (CN)
- Nanjing Tech University (CN)
- Central South University (CN)
- Ningbo University of Technology (CN)
- Hunan University (CN)
- National University of Defense Technology (CN)
- NeoPhotonics (United States) (US)
- The Synergetic Innovation Center for Advanced Materials (CN)
- Nanophoton (Brazil) (BR)
- Changsha University of Science and Technology (CN)
- King Abdullah University of Science and Technology (SA)
Publication Details
- Journal
- ACS Nano
- Published
- 2024-10-22
- DOI
- https://doi.org/10.1021/acsnano.4c06597
- Citations
- 24
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.81
Funders
- Natural Science Foundation of Hunan Province