Single-crystal two-dimensional material epitaxy on tailored non-single-crystal substrates
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- Single-crystal two-dimensional material epitaxy on tailored non-single-crystal substrates
- Li, Xin; Wu, Guilin; Zhang, Leining; Huang, Deping; Li, Yunqing; Zhang, Ruiqi; Li, Meng; Zhu, Lin; Guo, Jing; Huang, Tianlin; Shen, Jun; Wei, Xingzhan; Yu, Ka Man; Dong, Jichen; Altman, Michael S.; Ruoff, Rodney S.; Duan, Yinwu; Yu, Jie; Wang, Zhujun; Huang, Xiaoxu; Ding, Feng; Shi, Haofei; Tang, Wenxin
- Issue Date
- NATURE PORTFOLIO
- NATURE COMMUNICATIONS, v.13, no.1, pp.1773
- The use of single-crystal substrates as templates for the epitaxial growth of single-crystal overlayers has been a primary principle of materials epitaxy for more than 70 years. Here we report our finding that, though counterintuitive, single-crystal 2D materials can be epitaxially grown on twinned crystals. By establishing a geometric principle to describe 2D materials alignment on high-index surfaces, we show that 2D material islands grown on the two sides of a twin boundary can be well aligned. To validate this prediction, wafer-scale Cu foils with abundant twin boundaries were synthesized, and on the surfaces of these polycrystalline Cu foils, we have successfully grown wafer-scale single-crystal graphene and hexagonal boron nitride films. In addition, to greatly increasing the availability of large area high-quality 2D single crystals, our discovery also extends the fundamental understanding of materials epitaxy. The heteroepitaxial growth of crystalline 2D materials is usually based on single-crystal substrates. Here, the authors demonstrate that single-crystal graphene and hexagonal boron nitride films can be successfully grown on wafer-scale copper foils with tailored twin boundaries.
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