Synthesis of relatively small-diameter tungsten ditelluride nanowires from solution-grown tungsten oxide nanowires
Synthesis of relatively small-diameter tungsten ditelluride nanowires from solution-grown tungsten oxide nanowires
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DOI：
10.35848/1347-4065/abe201
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发表时间：
2021-02
影响因子：
1.5
通讯作者：
Yohei Yomogida;Mai Nagano;H. Hamasaki;K. Hirahara;Y. Miyata;K. Yanagi
中科院分区：
文献类型：
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作者：
Yohei Yomogida;Mai Nagano;H. Hamasaki;K. Hirahara;Y. Miyata;K. Yanagi
二碲化钨(WTe2)是一种半金属过渡金属二卤化物(TMDC)。WTe2在拓扑性质和电池等方面的应用引起了人们的极大兴趣。在本研究中，我们开发了一种从溶液生长的氧化钨纳米线中获得WTe2纳米线的方法。通过优化对样品组成和结构有很大影响的Te蒸气的供应，并以小直径溶液生长的纳米线为前驱体，最终合成了直径较小的直径为15-50 nm的WTe2纳米线。有趣的是，纳米线结构主要是通过碲化获得的，但当对相同的前驱体进行硫化和硒处理时，得到的是纳米管结构。我们认为，通过脉冲化增加的体积是决定纳米管和纳米线形成的关键参数。
Tungsten ditelluride (WTe2) is a semi-metallic transition metal dichalcogenide (TMDC). WTe2 has attracted a lot of interest for topological properties and various applications such as batteries. In this study, we developed a method to obtain WTe2 nanowires from solution-grown tungsten oxide nanowires. By optimizing the supply of Te vapor, which strongly influences sample composition and structure, and using small-diameter solution-grown nanowires as precursors, we finally synthesized relatively small-diameter WTe2 nanowires with diameters of 15–50 nm. Interestingly, nanowire structures are mainly obtained via tellurization, but when sulfurization and selenization are applied on the same precursors, nanotube structures are obtained. We assume that the volume increase via chalogenization is a key parameter that determines the formation of nanotubes and nanowires.