Synthesis of Large-Area Single- to Few-Layered MoS2 on an Ionic Liquid Surface,ACS Applied Materials & Interfaces

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Synthesis of Large-Area Single- to Few-Layered MoS2 on an Ionic Liquid Surface
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-03-06 , DOI: 10.1021/acsami.2c22150
Jiawei Shen ₁ , Yi He ₁ , Cheng Gao ₁ , Xiangming Tao ₁ , Bo Yang ₁ , Miao Wang ₁ , Gaoxiang Ye ₁

Affiliation

Large-area fabrication of transition metal dichalcogenides via environmentally friendly and efficient processes has been a long-standing issue in the field of two-dimensional (2D) materials. Here, we report that single- to few-layered MoS₂ sheets with an average size of the order of micrometers have been successfully synthesized on an ionic liquid surface by a modified low-pressure chemical vapor deposition (LP-CVD) method without the assistance of catalysts. It is found that the MoS₂ sheets grown on the liquid substrate exhibit a complete molecular crystal structure, which is confirmed by transmission electron microscopy (TEM), Raman spectroscopy, and photoluminescence (PL) spectroscopy measurements. The interlayer spacing does not change significantly with the increase of the MoS₂ layers, corresponding to a layer-by-layer growth pattern. The growth mechanism of the MoS₂ sheets is presented according to the experimental results. The work provides a new and simple method of preparing more molecular crystals on liquid substrates and will contribute to further research in this field.

中文翻译：

在离子液体表面上合成大面积单层到几层 MoS2

通过环保高效的工艺大面积制造过渡金属二硫化物一直是二维 (2D) 材料领域的一个长期存在的问题。在这里，我们报告了在离子液体表面通过改进的低压化学气相沉积 (LP-CVD) 方法在没有辅助的情况下成功合成了平均尺寸为微米级的单层或几层 MoS 2_片催化剂。发现在液体基板上生长的MoS _{2片具有完整的分子晶体结构，这已通过透射电子显微镜 (TEM)、拉曼光谱和光致发光 (PL) 光谱测量得到证实。}随着MoS2的增加层间距没有明显变化₂层，对应逐层生长模式。根据实验结果介绍了MoS ₂片的生长机制。该工作提供了一种在液态基板上制备更多分子晶体的新的、简单的方法，将有助于该领域的进一步研究。

更新日期：2023-03-06

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