Twin Defect Derived Growth of Atomically Thin MoS2 Dendrites

Wang, Jingwei1,2,3,4; Cai, Xiangbin3,4; Shi, Run1,2,3,4; Wu, Zefei3,4; Wang, Weijun1,2; Long, Gen3,4; Tang, Yongjian3,4,6; Cai, Nianduo1,2; Ouyang, Wenkai1,2; Geng, Pai1,2; Chandrashekar, Bananakere Nanjegowda1,2; Amini, Abbas5; Wang, Ning3,4; Cheng, Chun1,2

2018-01

10.1021/acsnano.7b07693

ACS Nano   影响因子和分区

1936-0851

1936-086X

Morphology management for tailoring the properties of monolayer transition-metal dichalcogenides (TMDCs), that is, molybdenum disulfide (MoS2), has attracted great interest for promising applications such as in electrocatalysis and optoelectronics. Nevertheless, little progress has been made in engineering the shape of MoS2. Herein, we introduce a modified chemical vapor deposition method to grow monolayer MoS2 dendrites by pretreating substrates with adhesive tapes. The as-grown MoS2 crystals are featured with hexagonal backbones with fractal shapes and tunable degrees. By characterizing the atomic structure, it is found that these morphologies are mainly initiated from the twin defect derived growth and controlled by the S:Mo vapor ratio. Due to the accumulated sulfur vacancies in the cyclic twin regions, strong enhancement of photoluminescence emission is localized, which determines the shape dependency of optical property. This work not only enriches the understanding of the twin defects derived crystal growth mechanism and extends its applications from nanomaterials to two-dimensional crystals, but also offers a robust and controllable protocol for shape-engineered monolayer TMDCs in electrochemical and optoelectronic applications.

molybdenum disulfide dendritic crystal twin crystal snowflake shape engineering chemical vapor deposition

SCI ; EI

英语

NI期刊

第一 ; 通讯

Student Innovation Training Programs[SITP2016G02] ; Student Innovation Training Programs[SITP2016X04] ; Student Innovation Training Programs[SITP2016S18] ; Student Innovation Training Programs[pdjh2016b0444] ; Student Innovation Training Programs[pdjh2017b0446] ; Student Innovation Training Programs[pdjh2017c0009] ; Student Innovation Training Programs[pdjh2017c0020] ; Student Innovation Training Programs[pdjh2017c0025]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000423495200068

AMER CHEMICAL SOC

20180804821315

Chemical vapor deposition ; Crystal atomic structure ; Electrocatalysis ; Layered semiconductors ; Molybdenum compounds ; Monolayers ; Optical properties ; Transition metals

Metallurgy and Metallography:531 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Atomic and Molecular Physics:931.3

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Nanoimprint Technol, Shenzhen 518055, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China
4.Hong Kong Univ Sci & Technol, Ctr Quantum Mat 1D 2D, Kowloon, Hong Kong, Peoples R China
5.Western Sydney Univ, Ctr Infrastruct Engn, Kingswood, NSW 2751, Australia
6.Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

Wang, Jingwei,Cai, Xiangbin,Shi, Run,et al. Twin Defect Derived Growth of Atomically Thin MoS2 Dendrites[J]. ACS Nano,2018,12(1):635-643.

Wang, Jingwei.,Cai, Xiangbin.,Shi, Run.,Wu, Zefei.,Wang, Weijun.,...&Cheng, Chun.(2018).Twin Defect Derived Growth of Atomically Thin MoS2 Dendrites.ACS Nano,12(1),635-643.

Wang, Jingwei,et al."Twin Defect Derived Growth of Atomically Thin MoS2 Dendrites".ACS Nano 12.1(2018):635-643.