DataVXAdvanced MaterialsPaper
journal article·2024-05

CVD Synthesis of Twisted Bilayer WS2 with Tunable Second Harmonic Generation

Manzhang Xu, Hongjia Ji, Mingwen Zhang, Lu Zheng, Weiwei Li, Lei Luo, Mengdi Chen, Zheng Liu, Xuetao Gan, Xuewen Wang, Wei Huang

Advanced Materials· Volume 36· Issue 19
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Source abstract

Abstract

Abstract The introduction of rotational freedom by twist angles in twisted bilayer (TB) transition metal dichalcogenides (TMDCs) can tailor the inherent properties of the TMDCs, which provides a promising platform to investigate the exotic physical properties. However, direct synthesis of high‐quality TB‐TMDCs with full twist angles is significantly challenging due to the substantial energy barriers during crystal growth. Here, a modified chemical vapor deposition strategy is proposed to synthesize TB‐WS2 with a wide twist angle range from 0° to 120°. Utilizing a tilted SiO2/Si substrate, a gas flow disturbance is generated in the furnace tube to create a heterogeneous concentration gradient of the metal precursor, which provides an extra driving force for the growth of TB‐WS2. The Raman and photoluminescence results confirm a weak interlayer coupling of the TB‐WS2. High‐quality periodic Moiré patterns are observed in the scanning transmission electron microscopy images. Moreover, owing to the strong correlation between the nonlinear optical response and the twisted crystal structure, tunable second harmonic generation behaviors are realized in the TB‐WS2. This approach opens up a new avenue for the direct growth of high‐crystalline‐quality and pristine TB‐TMDCs and their potential applications in nonlinear optical devices.
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Research context

Materials processing

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Advanced Memory and Neural Computing

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

Affiliations

Frontiers Science Center for Flexible Electronics (FSCFE) & Institute of Flexible Electronics (IFE) Northwestern Polytechnical University Xi'an 710072 P. R. China

MIIT Key Laboratory of Flexible Electronics (KLoFE) Northwestern Polytechnical University Xi'an 710072 P. R. China

Shaanxi Key Laboratory of Flexible Electronics (KLoFE) Northwestern Polytechnical University Xi'an 710072 P. R. China

Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technology and Shaanxi Key Laboratory of Optical Information Technology School of Physical Science and Technology Northwestern Polytechnical University Xi'an 710129 China

School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

State Key Laboratory of Organic Electronics and Information Displays Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing 210023 China

Key Laboratory of Flexible Electronics (KLoFE) and Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) Nanjing 211800 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shaanxi Province · Fundamental Research Funds for the Central Universities

References (46)

Show source-provided references
1. 10.1002/adfm.20190493210.1002/adfm.201904932 ↗
2. 10.1038/s41467-018-03888-410.1038/s41467-018-03888-4 ↗
3. 10.1103/PhysRevB.105.16543010.1103/PhysRevB.105.165430 ↗
4. 10.1007/s12274-021-3779-z10.1007/s12274-021-3779-z ↗
5. 10.1016/j.mattod.2023.02.00310.1016/j.mattod.2023.02.003 ↗
6. 10.1007/s42864-023-00209-110.1007/s42864-023-00209-1 ↗
7. 10.1039/D0NH00248H10.1039/D0NH00248H ↗
8. 10.1039/D2NR02450K10.1039/D2NR02450K ↗
9. 10.1038/s41467-021-27042-910.1038/s41467-021-27042-9 ↗
10. 10.1038/nature2615410.1038/nature26154 ↗
11. 10.1126/science.aav191010.1126/science.aav1910 ↗
12. 10.1021/acsnano.3c0571110.1021/acsnano.3c05711 ↗
13. 10.1038/s41586-018-0008-310.1038/s41586-018-0008-3 ↗
14. 10.1038/s41467-022-31604-w10.1038/s41467-022-31604-w ↗
15. 10.1038/s41567-020-0958-x10.1038/s41567-020-0958-x ↗
16. 10.1021/jacs.1c0678610.1021/jacs.1c06786 ↗
17. 10.1038/s41467-022-35477-x10.1038/s41467-022-35477-x ↗
18. 10.1088/2053-1583/abd3e710.1088/2053-1583/abd3e7 ↗
19. 10.1002/sstr.20200015310.1002/sstr.202000153 ↗
20. 10.1021/acsami.1c0313510.1021/acsami.1c03135 ↗
21. 10.1002/adfm.20211152910.1002/adfm.202111529 ↗
22. 10.1021/acs.nanolett.5b0388310.1021/acs.nanolett.5b03883 ↗
23. 10.3390/nano1108199410.3390/nano11081994 ↗
24. 10.1038/s41467-023-44598-w10.1038/s41467-023-44598-w ↗
25. 10.1038/ncomms596610.1038/ncomms5966 ↗
26. 10.1002/adom.20150030110.1002/adom.201500301 ↗
27. 10.1021/acs.chemmater.0c0341310.1021/acs.chemmater.0c03413 ↗
28. 10.1002/adfm.20210645010.1002/adfm.202106450 ↗
29. 10.1002/anie.20140974310.1002/anie.201409743 ↗
30. 10.1038/s41467-020-16056-410.1038/s41467-020-16056-4 ↗
31. 10.1007/s12274-022-4579-910.1007/s12274-022-4579-9 ↗
32. 10.1088/2053-1583/aa5b0110.1088/2053-1583/aa5b01 ↗
33. 10.1038/s41467-021-22533-110.1038/s41467-021-22533-1 ↗
34. 10.1021/nn100393710.1021/nn1003937 ↗
35. 10.1039/C9NR10186A10.1039/C9NR10186A ↗
36. 10.1088/1361-6528/ab22e610.1088/1361-6528/ab22e6 ↗
37. McCreary K. M. · Stem Cells Int. · 2016 · 6
38. 10.1002/adfm.20180926110.1002/adfm.201809261 ↗
39. 10.1039/C5TC00016E10.1039/C5TC00016E ↗
40. 10.1002/adom.20130042810.1002/adom.201300428 ↗
41. 10.1021/acsnano.7b0856610.1021/acsnano.7b08566 ↗
42. 10.1021/acs.nanolett.2c0046210.1021/acs.nanolett.2c00462 ↗
43. 10.1126/science.aat698110.1126/science.aat6981 ↗
44. 10.1021/acsnano.7b0145710.1021/acsnano.7b01457 ↗
45. 10.1021/nn500228r10.1021/nn500228r ↗
46. 10.1002/adom.20200127310.1002/adom.202001273 ↗