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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
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 DJ,Xiong Q,Zhang L,Zheng Wdoi
10.1038/s41467-019-12347-7subject
Has Abstractpub_date
2019-10-02 00:00:00pages
4472issue
1issn
2041-1723pii
10.1038/s41467-019-12347-7journal_volume
10pub_type
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