Synthesis of High-Quality WS2 Crystals on an Ionic Liquid Surface Near Room Temperature

IF 3.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Crystal Growth & Design Pub Date : 2025-02-21 DOI:10.1021/acs.cgd.4c0150910.1021/acs.cgd.4c01509

Jiawei Shen*, and , Gaoxiang Ye,

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引用次数: 0

Abstract

High-quality and catalyst-free fabrication of transition-metal dichalcogenides at room temperature has been a goal in the two-dimensional material research field. In this work, we report an efficient approach to synthesize high-quality tungsten disulfide (WS₂) via an optimized low-pressure chemical vapor deposition (LP-CVD) technique on an ionic liquid surface near room temperature. It is found that single- to few-layered and bulk-shaped (triangular and hexagonal) WS₂ crystals may be prepared on the liquid surface simultaneously. The most probable sizes of the triangular and hexagonal WS₂ crystals are 574.7 ± 18.4 and 399.3 ± 41.0 nm, respectively. The average terrace width of the WS₂ crystals with multiple concentric hexagons is about 35 nm. Based on the experimental results, a three-stage growth model of the WS₂ crystals is proposed. The work provides an understanding of the mechanism of the crystals and shows an optimization of the growth process on the liquid substrates.

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.