Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2

Niu, Kangdi1; Weng, Mouyi2,3; Li, Songge1; Guo, Zenglong1; Wang, Gang1; Han, Mengjiao1,2; Pan, Feng3; Lin, Junhao1,2

2021-08-01

10.1002/advs.202101563

ADVANCED SCIENCE   影响因子和分区

2198-3844

Probing large-scale intrinsic structure of air-sensitive 2D materials with atomic resolution is so far challenging due to their rapid oxidization and contamination. Here, by keeping the whole experiment including growth, transfer, and characterizations in an interconnected atmosphere-control environment, the large-scale intact lattice structure of air-sensitive monolayer 1T'-WTe2 is directly visualized by atom-resolved scanning transmission electron microscopy. Benefit from the large-scale atomic mapping, collective lattice distortions are further unveiled due to the presence of anisotropic rippling, which propagates perpendicular to only one of the preferential lattice planes in the same WTe2 monolayer. Such anisotropic lattice rippling modulates the intrinsic point defect (Te vacancy) distribution, in which they aggregate at the constrictive inner side of the undulating structure, presumably due to the ripple-induced asymmetric strain as elaborated by density functional theory. The results pave the way for atomic characterizations and defect engineering of air-sensitive 2D layered materials.

air-sensitive 2D materials anisotropic ripple large-scale atomic mapping Te vacancy WTe2 monolayer

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[11974156] ; National Key R&D Program of China[2016YFB0700600] ; Guangdong International Science Collaboration Project[2019A050510001] ; Guangdong Innovative and Entrepreneurial Research Team Program[2019ZT08C044] ; Shenzhen Science and Technology Program["KQTD20190929173815000",20200925161102001] ; Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS20190902092905285] ; Special Funds for the Cultivation of Guangdong College Students Special Funds[pdjh2020c0086]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000693198000001

WILEY

20213510846834

Anisotropy ; Atoms ; Defects ; Density functional theory ; High resolution transmission electron microscopy ; Lattice theory ; Monolayers ; Scanning electron microscopy ; Tellurium compounds

Optical Devices and Systems:741.3 ; Mathematical Statistics:922.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China
3.Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China

Niu, Kangdi,Weng, Mouyi,Li, Songge,et al. Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2[J]. ADVANCED SCIENCE,2021,8.

Niu, Kangdi.,Weng, Mouyi.,Li, Songge.,Guo, Zenglong.,Wang, Gang.,...&Lin, Junhao.(2021).Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2.ADVANCED SCIENCE,8.

Niu, Kangdi,et al."Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2".ADVANCED SCIENCE 8(2021).