Interface-mediated noble metal deposition on transition metal dichalcogenide nanostructures
Interface-mediated noble metal deposition on transition metal dichalcogenide nanostructures
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DOI：
10.1038/s41557-020-0418-3
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发表时间：
2020-02
期刊：
影响因子：
21.8
通讯作者：
Yifan Sun;Yuanxi Wang;Jamie Y. C. Chen;K. Fujisawa;Cameron F. Holder;Jeffery T. Miller;V. Crespi
中科院分区：
文献类型：
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作者：
Yifan Sun;Yuanxi Wang;Jamie Y. C. Chen;K. Fujisawa;Cameron F. Holder;Jeffery T. Miller;V. Crespi
用贵金属官能化过渡金属二硫属化物（TMD）纳米片的表面对于使它们与设备电接触以及提高它们的催化和传感能力是重要的。溶液相沉积提供了一种可扩展的方法来创建金属-TMD混合系统，但控制这样的过程仍然具有挑战性。在这里，我们阐明了金和银存款在室温下的胶体1 T-WS 2，2 H-WS 2，2 H-MoSe 2，2 H-WSe 2，1 T ′-MoTe 2和Td-WTe 2少层纳米结构，以产生几个不同的类的0 D-2D和2D-2D金属TMD杂化物的不同途径。在所有的TMD上形成均匀的金纳米颗粒。相比之下，银作为具有双峰尺寸分布的纳米颗粒沉积在二硫化物和二硒化物上，并且作为原子薄层沉积在二碲化物上。这些表面结合的金属物种的各种尺寸和形态产生的界面金属硫族元素键的相对强度，在减少Au 3+或Ag+的TMD。
Functionalizing the surfaces of transition metal dichalcogenide (TMD) nanosheets with noble metals is important for electrically contacting them to devices, as well as improving their catalytic and sensing capabilities. Solution-phase deposition provides a scalable approach to the creation of metal–TMD hybrid systems, but controlling such processes remains challenging. Here we elucidate the different pathways by which gold and silver deposit at room temperature onto colloidal 1T-WS2, 2H-WS2, 2H-MoSe2, 2H-WSe2, 1T′-MoTe2and Td-WTe2few-layer nanostructures to produce several distinct classes of 0D–2D and 2D–2D metal–TMD hybrids. Uniform gold nanoparticles form on all of the TMDs. By contrast, silver deposits as nanoparticles with a bimodal size distribution on the disulfides and diselenides, and as atomically thin layers on the ditellurides. The various sizes and morphologies of these surface-bound metal species arise from the relative strengths of the interfacial metal–chalcogen bonds during the reduction of Au3+or Ag+by the TMDs.