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Growth Anisotropy and Morphology Evolution of Line Defects in Monolayer MoS2: Atomic-Level Observation, Large-Scale Statistics, and Mechanism Understanding

文献类型：期刊论文

作者Li, Shouheng4,5; Lin JG(林金国)2,3; Chen, Yun5; Luo, Zheng5; Cheng, Haifeng5; Liu F(刘峰)2,3; Zhang, Jin1,4; Wang, Shanshan1,5
刊名SMALL
出版日期2023-09-25
页码11
ISSN号1613-6810
关键词2D materials AC-transmission electron microscopy (TEM) growth anisotropy line defects morphology MoS2
DOI10.1002/smll.202303511
通讯作者Liu, Feng(liufeng@imech.ac.cn) ; Wang, Shanshan(wangshanshan08@nudt.edu.cn)
英文摘要Understanding the growth behavior and morphology evolution of defects in 2D transition metal dichalcogenides is significant for the performance tuning of nanoelectronic devices. Here, the low-voltage aberration-corrected transmission electron microscopy with an in situ heating holder and a fast frame rate camera to investigate the sulfur vacancy lines in monolayer MoS2 is applied. Vacancy concentration-dependent growth anisotropy is discovered, displaying first lengthening and then broadening of line defects as the vacancy densifies. With the temperature increase from 20 degrees C to 800 degrees C, the defect morphology evolves from a dense triangular network to an ultralong linear structure due to the temperature-sensitive vacancy migration process. Atomistic dynamics of line defect reconstruction on the millisecond time scale are also captured. Density functional theory calculations, Monte Carlo simulation, and configurational force analysis are implemented to understand the growth and reconstruction mechanisms at relevant time and length scales. Throughout the work, high-resolution imaging is closely combined with quantitative analysis of images involving thousands of atoms so that the atomic-level structure and the large-area statistical rules are obtained simultaneously. The work provides new ideas for balancing the accuracy and universality of discoveries in the TEM study and will be helpful to the controlled sculpture of nanomaterials.
分类号一类
WOS关键词CHEMICAL-VAPOR-DEPOSITION ; EPITAXIAL-GROWTH ; SINGLE-CRYSTALS ; VISUALIZATION ; EFFICIENCY
资助项目S.W. acknowledges support from the National Natural Science Foundation of China (52172032, 52222201), Young Elite Scientist Sponsorship Program by CAST (YESS20200222), State Administration of Science, Technology, and Industry for National Defense (WDZC2019[11972349] ; S.W. acknowledges support from the National Natural Science Foundation of China (52172032, 52222201), Young Elite Scientist Sponsorship Program by CAST (YESS20200222), State Administration of Science, Technology, and Industry for National Defense (WDZC2019[11790292] ; National Natural Science Foundation of China[YESS20200222] ; Young Elite Scientist Sponsorship Program by CAST[WDZC20195500503] ; State Administration of Science, Technology, and Industry for National Defense[ZZCX-ZZGC-01-07] ; National University of Defense Technology[2022JJ20044] ; Hunan Natural Science Foundation[2016YFA0200100] ; Hunan Natural Science Foundation[2018YFA0703502] ; Ministry of Science and Technology of China[XDB36030100] ; Strategic Priority Research Program of CAS[BNLMS-CXTD-202001] ; Beijing National Laboratory for Molecular Sciences[XDB22040503] ; Strategic Priority Research Program of the Chinese Academy of Sciences
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:001071478400001
资助机构S.W. acknowledges support from the National Natural Science Foundation of China (52172032, 52222201), Young Elite Scientist Sponsorship Program by CAST (YESS20200222), State Administration of Science, Technology, and Industry for National Defense (WDZC2019 ; National Natural Science Foundation of China ; Young Elite Scientist Sponsorship Program by CAST ; State Administration of Science, Technology, and Industry for National Defense ; National University of Defense Technology ; Hunan Natural Science Foundation ; Ministry of Science and Technology of China ; Strategic Priority Research Program of CAS ; Beijing National Laboratory for Molecular Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者Liu, Feng ; Wang, Shanshan
源URL[http://dspace.imech.ac.cn/handle/311007/93023]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
4.Peking Univ, Coll Chem & Mol Engn, Ctr Nanochem, Beijing Sci & Engn Ctr Nanocarbons,Beijing Natl La, Beijing 100871, Peoples R China;
5.Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Peoples R China;
推荐引用方式
GB/T 7714		 Li, Shouheng,Lin JG,Chen, Yun,et al. Growth Anisotropy and Morphology Evolution of Line Defects in Monolayer MoS2: Atomic-Level Observation, Large-Scale Statistics, and Mechanism Understanding[J]. SMALL,2023:11.
APA Li, Shouheng.,林金国.,Chen, Yun.,Luo, Zheng.,Cheng, Haifeng.,...&Wang, Shanshan.(2023).Growth Anisotropy and Morphology Evolution of Line Defects in Monolayer MoS2: Atomic-Level Observation, Large-Scale Statistics, and Mechanism Understanding.SMALL,11.
MLA Li, Shouheng,et al."Growth Anisotropy and Morphology Evolution of Line Defects in Monolayer MoS2: Atomic-Level Observation, Large-Scale Statistics, and Mechanism Understanding".SMALL (2023):11.

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来源：力学研究所

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