Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices
Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices
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DOI：
10.1126/science.aba1416
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发表时间：
2020-02-21
期刊：
影响因子：
56.9
通讯作者：
Zhu, X. -Y.
中科院分区：
文献类型：
--
作者：
Liu, Fang;Wu, Wenjing;Zhu, X. -Y.
从层状货车德瓦耳斯（vdW）晶体的二维材料持有电子，光电和量子器件的巨大希望，但技术的实施将受到阻碍，缺乏高通量的技术剥离单晶单层足够的大小和高质量。在这里，我们报告了一种简便的方法来拆卸VDW单晶层的单层与近统一的产量和尺寸仅限于散装晶体尺寸。宏观单层的质量与常规透明胶带剥离的微观单层相当。单层可以组装成宏观人工结构，包括具有破缺的反转对称性和显著增强的非线性光学响应的过渡金属二硫属化物多层膜。这种方法使我们离大规模生产宏观单层和具有可控特性的块状人工材料更近了一步。
Two-dimensional materials from layered van der Waals (vdW) crystals hold great promise for electronic, optoelectronic, and quantum devices, but technological implementation will be hampered by the lack of high-throughput techniques for exfoliating single-crystal monolayers with sufficient size and high quality. Here, we report a facile method to disassemble vdW single crystals layer by layer into monolayers with near-unity yield and with dimensions limited only by bulk crystal sizes. The macroscopic monolayers are comparable in quality to microscopic monolayers from conventional Scotch tape exfoliation. The monolayers can be assembled into macroscopic artificial structures, including transition metal dichalcogenide multilayers with broken inversion symmetry and substantially enhanced nonlinear optical response. This approach takes us one step closer to mass production of macroscopic monolayers and bulk-like artificial materials with controllable properties.