There has been a massive growth in the study of transition metal dichalcogenides (TMDs) over the past decade, based upon their interesting and unusual electronic, optical and mechanical properties, such as tuneable and strain-dependent bandgaps. Tungsten disulphide (WS 2 ), as a typical example of TMDs, has considerable potential in applications such as strain engineered devices and the next generation multifunctional polymer nanocomposites. However, controlling the strain, or more practically, monitoring the strain in WS 2 and the associated micromechanics have not been so well studied. Both photoluminescence (PL) spectroscopy and Raman spectroscopy have been proved to be effective but PL cannot be employed to characterise multilayer TMDs while it is difficult for Raman spectroscopy to reveal the band structure. In this present study, PL and Raman spectroscopy have been combined to monitor the strain distribution and stress transfer of monolayer WS 2

中文翻译：

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单层WS 2和WS 2纳米复合材料中的应变工程

在过去的十年中，过渡金属二硫化碳（TMDs）的研究以其有趣的和不寻常的电子，光学和机械特性（如可调谐和应变依赖性带隙）而得到了极大的发展。作为TMD的典型示例，二硫化钨（WS 2）在应变工程设备和下一代多功能聚合物纳米复合材料等应用中具有相当大的潜力。但是，尚未很好地研究控制应变，或更实际地，在WS 2中监视应变以及相关的微力学。已证明光致发光（PL）光谱和拉曼光谱均有效，但不能使用PL来表征多层TMD，而拉曼光谱难以揭示能带结构。在本研究中，