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Title: Bottom-up growth of homogeneous Moiré superlattices in bismuth oxychloride spiral nanosheets
Authors: Liu, L.
Sun, Y.
Cui, X.
Qi, K.
He, X.
Bao, Q.
Ma, W.
Lu, J. 
Fang, H. 
Zhang, P.
Zheng, L.
Yu, L.
Singh, D.J.
Xiong, Q.
Zhang, L.
Zheng, W.
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: Liu, L., Sun, Y., Cui, X., Qi, K., He, X., Bao, Q., Ma, W., Lu, J., Fang, H., Zhang, P., Zheng, L., Yu, L., Singh, D.J., Xiong, Q., Zhang, L., Zheng, W. (2019). Bottom-up growth of homogeneous Moiré superlattices in bismuth oxychloride spiral nanosheets. Nature Communications 10 (1) : 4472. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Moiré 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 (∼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 Moiré potential modulation. Our results demonstrate the promise of MSL materials for chemical and physical functions. © 2019, The Author(s).
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/s41467-019-12347-7
Rights: Attribution 4.0 International
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