Journal
SMALL
Volume 16, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201906734
Keywords
large-size 2D materials; physical exfoliation; ultrasonic-ball milling; undistorted lattice structure
Categories
Funding
- National Natural Science Foundation of China [51872162, 11890700]
- Natural Science Foundation of Shandong Province [ZR2018MEM013]
- China Postdoctoral Science Foundation [2019TQ0172]
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Large-size ultrathin 2D materials, with extensive applications in optics, medicine, biology, and semiconductor fields, can be prepared through an existing common physical and chemical process. However, the current exfoliation technologies still need to be improved upon with urgency. Herein, a novel and simple ultrasonic-ball milling strategy is reported to effectively obtain high quality and large size ultrathin 2D materials with complete lattice structure through the introduction of moderate sapphire (Al2O3) abrasives in a liquid phase system. Ultimately numerous high-quality ultrathin h-BN, graphene, MoS2, WS2, and BCN nanosheets are obtained with large sizes ranging from 1-20 mu m, small thickness of approximate to 1-3 nm and a high yield of over 20%. Utilizing shear and friction force synergistically, this strategy provides a new method and alternative for preparing and optimizing large size ultrathin 2D materials.
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