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Review Article

Anisotropic monolayer of ReX2 on Au foils for exploring abnormal growth behavior and electronic properties

Wenzhi Quan1,§Shuangyuan Pan2,§Fan Zhou1Yanfeng Zhang1,2( )
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
School of Materials Science and Engineering, Peking University, Beijing 100871, China

§ Wenzhi Quan and Shuangyuan Pan contributed equally to this work.

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Graphical Abstract

Recent progresses on the chemical vapor deposition (CVD) syntheses of high-quality monolayer ReX2 flakes/films and their heterostructures with graphene on Au foils are comprehensively introduced. In situ characterizations on their atomic-scale structures, electronic properties, and growth behaviors are also discussed.

Abstract

As an emerging class of semiconducting transition metal dichalcogenides (TMDCs), two-dimensional (2D) rhenium dichalcogenides (ReX2, X = S or Se) have recently aroused great research interest due to their unique anisotropic structure (1T′ phase), and the related novel properties and applications. Recently, many efforts have been devoted to the controllable syntheses of high-quality monolayer or few-layer ReX2 flakes/films by chemical vapor deposition (CVD), wherein the metallic Au foil is found to be a unique substrate, due to the relatively strong interfacial coupling between monolayer ReX2 and Au. And the conductive nature of Au enables in situ characterizations of the as-grown ReX2 samples, which is essential for exploring the fundamental properties and internal growth mechanisms. Hereby, this review focuses on the recent progresses on the CVD syntheses and in situ characterizations of high-quality monolayer ReX2 flakes/films and their heterostructures with graphene on Au foils. The effects of Au foils on improving the crystal quality and inducing the growth of monolayer ReX2 single crystals are intensively addressed. The crystallinity, domain morphology, atomic and electronic structures, as well as the growth behaviors of monolayer ReX2 flakes/films and graphene/ReX2 heterostructures on Au revealed by in situ characterization techniques are also highlighted. As contrasts, the growth behaviors of monolayer or few-layer ReX2 on insulating substrates are also discussed. Besides, the potential applications of 2D ReX2 in new-generation electronic, optoelectronic devices, and energy-related fields are also introduced. Finally, future research directions are also prospected for propelling the practical applications of 2D ReX2 materials in more versatile fields.

Nano Research
Pages 4197-4210
Cite this article:
Quan W, Pan S, Zhou F, et al. Anisotropic monolayer of ReX2 on Au foils for exploring abnormal growth behavior and electronic properties. Nano Research, 2023, 16(3): 4197-4210. https://doi.org/10.1007/s12274-022-4755-y
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Received: 28 May 2022
Revised: 28 June 2022
Accepted: 10 July 2022
Published: 24 August 2022
© Tsinghua University Press 2022
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