Construction of 2D lateral pseudoheterostructures by strain engineering

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Feng, Haifeng
Zhuang, Jincheng
Slattery, Ashley D
Wang, Liang
Xu, Zhongfei
Xu, Xun
Mitchell, David
Zheng, Tian
Li, Songlin
Higgins, Michael
Ren, Long
Sun, Ziqi
Dou, Shi Xue
Du, Yi
Hao, Weichang
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2017
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Abstract

Two-dimensional (2D) lateral heterostructures host unconventional physical properties due to their controllable band-offset tuning and interfacial sensitive characteristic. The lattice mismatch results in the difficulties to construct the perfect atomic interface in such 2D lateral heterostructures, which in turn limits their desirable properties and performances in applications. In this work, strain-modulated 2D lateral pseudoheterogeneous structures are designed and realized in the single-component 2D BiOBr nanosheets by taking advantage of their strain-sensitive crystal and electronic structures. The pseudoheterogeneous interface without atomic mismatch can be feasibly modulated by local strain distribution, which exhibits similar local electronic band structure of corresponding heterostructures. Significant enhancement in charge separation at the pseudoheterostructure was demonstrated under visible light irradiation, which is given rise to the controllable electronic band alignment across the interface. The construction of the lateral pseudoheterostructure offers a feasible and promising way to build unprecedented 2D systems with exciting properties.

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2D Materials

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4

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2

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© 2017 Institute of Physics Publishing. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher.Please refer to the journal's website for access to the definitive, published version.

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Macromolecular and materials chemistry

Materials engineering

Nanotechnology

Science & Technology

Materials Science, Multidisciplinary

Materials Science

pseudoheterostructure

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Feng, H; Zhuang, J; Slattery, AD; Wang, L; Xu, Z; Xu, X; Mitchell, D; Zheng, T; Li, S; Higgins, M; Ren, L; Sun, Z; Dou, SX; Du, Y; Hao, W, Construction of 2D lateral pseudoheterostructures by strain engineering, 2D Materials, 2017, 4 (2)

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