Details

Autor(en) / Beteiligte

• Liu, Lulu
• Sun, Yuanhui
• Cui, Xiaoqiang
• Qi, Kun
• He, Xin
• Bao, Qiaoliang
• Ma, Weiliang
• Lu, Jiong
• Fang, Hanyan
• Zhang, Peng
• Zheng, Lirong
• Yu, Liping
• Singh, David J
• Xiong, Qihua
• Zhang, Lijun
• Zheng, Weitao

Titel

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

Ist Teil von

• Nature communications, 2019-10, Vol.10 (1), p.4472-10, Article 4472

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.