journal article·2024-11-05

Controllable Synthesis of WSe2–WS2 Lateral Heterostructures via Atomic Substitution

Shunhui Zhang, Hang Liu, Fen Zhang, Xiaoming Zheng, Xiangzhe Zhang, Baihui Zhang, Tian Zhang, Zhikang Ao, Xuyang Zhang, Xiang Lan, Xiangdong Yang, Mianzeng Zhong, Jia Li, Bo Li, Huifang Ma, Xidong Duan, Jun He, Zhengwei Zhang

ACS Nano· Volume 18· Issue 44
Publisher page

Abstract

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 2 –WS 2 heterostructures with a relatively sharp interface from monolayer WSe 2 using a chalcogen atom-exchange synthesis route at high temperatures for short periods. The substitution was initiated at the edges of monolayer WSe 2 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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hunan Key Laboratory of Nanophotonics and Devices, School of Physics

Central South University

Physical Sciences and Engineering Division

King Abdullah University of Science and Technology

School of Physics and Electronic Science

Hunan University of Science and Technology

College of Advanced Interdisciplinary Studies

National University of Defense Technology

School of Materials Science and Engineering

Hunan University

School of Flexible Electronics (Future Technologies), Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials

Nanjing Tech University

School of Energy and Power Engineering

Changsha University of Science and Technology

Institute of Micro/Nano Materials and Devices

Ningbo University of Technology

Hunan Key Laboratory of Two-Dimensional Materials and State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering

Advanced Semiconductor Technology and Application Engineering Research Center of Ministry of Education of China, Changsha Semiconductor Technology and Application Innovation Research Institute, College of Semiconductors (College of Integrated Circuits)

Funding

Natural Science Foundation of Hunan Province · Changsha Natural Science Foundation

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