Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices

Liu, Fang; Wu, Wenjing; Bai, Yusong; Chae, Sang Hoon; Li, Qiuyang; Wang, Jue; Hone, James; Zhu, X. -Y.

doi:10.1126/science.aba1416

Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices

Journal Article · Thu Feb 20 04:00:00 EST 2020 · Science

DOI:https://doi.org/10.1126/science.aba1416· OSTI ID:1804011

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Department of Chemistry, Columbia University, New York, NY 10027, USA.; OSTI
Department of Chemistry, Columbia University, New York, NY 10027, USA.
Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.

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.

Research Organization:: USDOE Oak Ridge Institute for Science and Education (ORISE)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0014664

OSTI ID:: 1804011

Journal Information:: Science, Journal Name: Science Journal Issue: 6480 Vol. 367; ISSN 0036-8075

Publisher:: AAAS

Country of Publication:: United States

Language:: English

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