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Bottom-up growth of homogeneous Moiré superlattices in bismuth oxychloride spiral nanosheets.

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 Commun

journal_title

Nature communications

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 DJ,Xiong Q,Zhang L,Zheng W

doi

10.1038/s41467-019-12347-7

subject

Has Abstract

pub_date

2019-10-02 00:00:00

pages

4472

issue

1

issn

2041-1723

pii

10.1038/s41467-019-12347-7

journal_volume

10

pub_type

杂志文章

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