期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-12347-7
关键词
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资金
- National Key R&D Program of China [2016YFA0200400]
- National Natural Science Foundation of China [21275064, 61722403, 51571100, 51872116, 11674121]
- Jilin province science and technology development program [20190201233JC, 20190201016JC]
- Program for JLU Science and Technology Innovative Research Team (JLUSTIRT) [2017TD-09, 2017TD-03]
- Australian Research Council (ARC) [IH150100006, FT150100450, CE170100039]
- Singapore Ministry of Education via two Tier1 grants [RG 113/16, RG 194/17]
Moire superlattices (MSLs) are modulated structures produced from homogeneous or heterogeneous 2D layers stacked with a twist angle and/or lattice mismatch. Expanding the range of available materials, methods for fabricating MSL, and realization of unique emergent properties are key challenges. Here we report a facile bottom-up synthesis of homogeneous MSL based on a wide-gap 2D semiconductor, BiOCl, using a one-pot solvothermal approach with robust reproducibility. Unlike previous MSLs usually prepared by directly stacking two monolayers, our BiOCl MSLs are realized in a scalable, direct way through chemical growth of spiral-type nanosheets driven by screw-dislocations. We find emergent properties including large band gap reduction (similar to 0.6 eV), two-fold increase in carrier lifetime, and strongly enhanced photocatalytic activity. First-principles calculations reveal that such unusual properties can be ascribed to the locally enhanced inter-layer coupling associated with the Moire potential modulation. Our results demonstrate the promise of MSL materials for chemical and physical functions.
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