Contributors: Material Science and Engineering; Material Science and Engineering Program; Physical Sciences and Engineering; Physical Science and Engineering (PSE) Division; Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University, Changsha 410083, Hunan, China; College of Materials Science and Engineering, Hunan University, Changsha 410082, Hunan, China; School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China; School of Flexible Electronics (Future Technologies), Institute of Advanced Materials, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University, Nanjing 211816, China; School of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, China; Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, 315211, China
نبذة مختصرة : The conversion of chalcogen atoms into other types of chalcogen atoms in transition metal dichalcogenides exhibits significant advantages in tuning the bandgaps and constructing lateral heterojunctions. However, despite atomic defects at the atomic scale were inevitably formed during conversion process, the construction of dislocations remains difficult. Here, we conducted in-situ sulfurization to achieve structural transformation from monolayer WSe2 to WS2 successfully. We probe these transformations at atomic scale using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and study structural defects of sulfurized-WS2 by strain and displacement fields. We discovered that high-quality WSe2 flakes were completely sulfurized while dislocations were successfully constructed, manifesting atomic surface roughness and structural disorders. Our work provides insights into designing and optimizing customized Transition metal dichalcogenides (TMDs) materials in controlled synthesis and defect engineering. ; This work was financially supported by the National Natural Science Foundation of China (Grant No. 52302204, No. 52102176, No. 61904080, No. 62341402), Human Provincial Natural Science Foundation of China (Grant No. 2022JJ20085), Changsha Natural Science Foundation (Grant No. kq2202092), the Key Project of the Natural Science Program of Xinjiang Uygur Autonomous Region (Grant No. 2023D01D03).
Rights: NOTICE: this is the author’s version of a work that was accepted for publication in Progress in Natural Science: Materials International. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Progress in Natural Science: Materials International, [, , (2024-03)] DOI:10.1016/j.pnsc.2024.02.016 . © 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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