Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices
Abstract
Although the exfoliation of monolayers of materials such as transition metal dichalcogenides produces high-quality electronic materials with low defect densities, the size of the monolayers is limited to the micrometer scale. Liu et al. modified this method by creating atomically flat gold layers on polymer supports. The strong van der Waals adhesion of the gold layer allowed monolayers to be exfoliated on the centimeter scale. Multilayers could be reassembled to artificial structures, such as a MoSe 2 /WSe 2 single-crystal bilayer with a twist angle chosen to quench intralayer exciton formation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 21, 2020
- Source ID
- 10.1126/science.aba1416
Entities
People
- Fang Liu
- James C. Hone
- Jue Wang
- Qiuyang Li
- Sang Hoon Chae
- Wenjing Wu
- Xiaoyang Zhu
- Yusong Bai
Organizations
- Columbia University
- National Science Foundation
- Office of Naval Research
- United States Department of Energy