Synthesis and characterization of vertically standing MoS2 nanosheets.
Synthesis and characterization of vertically standing MoS2 nanosheets.
复制标题
垂直立式MoS2纳米片的合成与表征
DOI：
10.1038/srep21171
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发表时间：
2016-02-18
影响因子：
4.6
通讯作者：
Qian H
中科院分区：
文献类型：
--
作者：
Li H;Wu H;Yuan S;Qian H
二硫化钼(MoS_2)因其优异的电学和光学性质而备受关注。本文报道了用化学气相沉积法制备了具有垂直站立形貌的大尺寸、均匀的MoS_2纳米片。透射电子显微镜观察清楚地揭示了这些垂直结构的生长机制。认为垂直构造是由MoS2岛之间的挤压和挤压作用造成的。更重要的是，二维(2D)材料的垂直形态具有许多潜在的应用前景。我们证明了所合成的垂直站立的MoS_2纳米片可用于析氢反应，其交换电流密度约为块体MoS_2的70倍。垂直放置的MoS_2的场发射性能也因大量暴露的边缘而得到改善。
Molybdenum disulfide (MoS2) has been attracting much attentions due to its excellent electrical and optical properties. We report here the synthesis of large-scale and uniform MoS2 nanosheets with vertically standing morphology using chemical vapor deposition method. TEM observations clearly reveal the growth mechanism of these vertical structures. It is suggested that the vertical structures are caused by the compression and extrusion between MoS2 islands. More importantly, the vertical morphology of two dimensional (2D) materials hold many promising potential applications. We demonstrate here the as-synthesized vertically standing MoS2 nanosheets could be used for hydrogen evolution reaction, where the exchange current density is about 70 times of bulk MoS2. The field emission performance of vertically standing MoS2 were also improved due to the abundantly exposed edges.