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Facile fabrication of twisted MoS2 bilayers by direct bonding |
| Yu-Tong Chen(陈雨彤)1,2,†, Jie-Ying Liu(刘杰英)2,†,‡, Lan-Ying Zhou(周兰英)2, Hua Yu(余画)2, Tong Li(李童)2, Qing Guan(关清)2,5, Na Li(李娜)2, Yang Chai(柴扬)1,§, and Guang-Yu Zhang(张广宇)2,3,4,¶ |
1 Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China;
2 Songshan Lake Materials Laboratory, Dongguan 523808, China;
3 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
4 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
5 The School of Integrated Circuits, Sun Yat-sen University, Shenzhen 518107, China |
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Abstract When stacking two-dimensional (2D) materials with a lattice mismatch and/or a small twist, moiré superlattice emerges with fascinating electronic and optical properties. The fabrication of such stacked 2D materials usually requires multiple transfer and stack processes, assisted by a certain transfer medium which needs to be removed afterwards, and it is very challenging to maintain pristine and clean surfaces/interfaces for these stacked structures. In this work, we report a facile direct bonding method for fabrication of twisted MoS2 bilayers with ultra-clean surfaces/interfaces. Novel interlayer interactions are revealed in the as-fabricated high-quality samples, leading to twist-angle related dispersion behavior of various Raman modes, such as layer breathing modes, shear modes and E2g modes, as well as indirect bandgap excitons. Field-effect transistors (FETs) of twisted MoS2 bilayers also exhibit angle-dependent performance, which could be attributed to the band structure evolution. This facile method holds significance for the future integration of pre-designed multilayer 2D materials and paves a way to explore underlying physical mechanisms and potential applications.
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Received: 09 September 2025
Revised: 28 October 2025
Accepted manuscript online: 06 November 2025
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PACS:
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68.65.Cd
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(Superlattices)
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81.07.b
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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| Fund: This work is supported by Guangdong Major Project of Basic and Applied Basic Research (Grant No. 2021B0301030002), the National Key Research and Development Program (Grant No. 2021YFA1202900), and the National Natural Science Foundation of China (Grant Nos. 62204166 and 62404145). |
Corresponding Authors:
Jie-Ying Liu, Yang Chai, Guang-Yu Zhang
E-mail: jyliu@iphy.ac.cn;ychai@polyu.edu.hk;gyzhang@iphy.ac.cn
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Cite this article:
Yu-Tong Chen(陈雨彤), Jie-Ying Liu(刘杰英), Lan-Ying Zhou(周兰英), Hua Yu(余画), Tong Li(李童), Qing Guan(关清), Na Li(李娜), Yang Chai(柴扬), and Guang-Yu Zhang(张广宇) Facile fabrication of twisted MoS2 bilayers by direct bonding 2026 Chin. Phys. B 35 016803
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