State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, P. R. China.
Small. 2020 Apr;16(13):e1906734. doi: 10.1002/smll.201906734. Epub 2020 Mar 1.
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 (Al O ) abrasives in a liquid phase system. Ultimately numerous high-quality ultrathin h-BN, graphene, MoS , WS , and BCN nanosheets are obtained with large sizes ranging from 1-20 µm, small thickness of ≈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.
大尺寸超薄二维材料在光学、医学、生物学和半导体等领域有广泛的应用，可以通过现有的常见物理和化学过程来制备。然而，目前的剥离技术仍迫切需要改进。在此，报道了一种新颖而简单的“超声-球磨”策略，通过在液相体系中引入适量的蓝宝石（Al2O3）磨料，有效地获得具有完整晶格结构的高质量、大尺寸超薄二维材料。最终获得了大量高质量的超薄 h-BN、石墨烯、MoS2、WS2 和 BCN 纳米片，尺寸从 1-20 µm 不等，厚度约为 1-3 nm，产率超过 20%。该策略通过协同利用剪切力和摩擦力，为制备和优化大尺寸超薄二维材料提供了一种新的方法和选择。
