期刊
NANO RESEARCH
卷 10, 期 1, 页码 255-262出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1284-6
关键词
molybdenum disulfide; CVD growth; shape evolution; diagram; growth condition
类别
资金
- Global Frontier Research Center for Advanced Soft Electronics [2011-0031640]
- Nano-Material Technology Development Program [2012M3A7B4049807]
- Creative Materials Discovery Program [2016M3D1A1900035]
- LG Display Co., Ltd.
In the recent years, transition-metal dichalcogenides such as MoS2 have attracted considerable attention owing to their unique structure and electronic properties. Chemical vapor deposition (CVD) is a popular method for producing MoS2 flakes with different shapes. Here, we report an effective method for achieving a broad range of shape evolution in CVD-grown monolayer MoS2 flakes. By controlling the S and MoO3 temperatures, the shape of the monolayer MoS2 flakes was varied from hexagonal to triangular via intermediate shapes such as truncated and multi-apex triangles. The shape evolution of the MoS2 flakes can be explained by introducing the term nominal Mo:S ratio, which refers to the amount of loaded MoO3 and evaporated S powders. By using the nominal Mo:S ratio, we predicted the potential reaction atmosphere and effectively controlled the actual proportion of MoO3-x with respect to S in the growth region, along with the growth temperature. From the systematic investigation of the behavior of the shape evolution, we developed a shape-evolution diagram, which can be used as a practical guide for producing CVD-grown MoS2 flakes with desired shapes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据