Strain Engineering in Monolayer WS2 and WS2 Nanocomposites

作者: Ian A. Kinloch , Zheling Li , Mark A. Bissett , Fang Wang , Fang Wang

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摘要: There has been a massive growth in the study of transition metal dichalcogenides (TMDs) over past decade, based upon their interesting and unusual electronic, optical mechanical properties, such as tuneable strain-dependent bandgaps. Tungsten disulfide (WS2), typical example TMDs, considerable potential applications strain engineered devices next generation multifunctional polymer nanocomposites. However, controlling strain, or more practically, monitoring WS2 associated micromechanics have not so well studied. Both photoluminescence spectroscopy (PL) Raman proved to be effective but PL cannot employed characterise multilayer TMDs while it is difficult for reveal band structure. In this present study, combined monitor distribution stress transfer monolayer on flexible substrate It demonstrated that still follows continuum mechanics microscale generates non-uniform bandgap even single flake through simple engineering. shown these flakes could useful optoelectonic they become micron-sized emitters with gap can tuned by application external substrate. The analysis distributions using further extended thin-film few-layer nanocomposites where transferred effectively flakes. relationship between behaviour bulk composites investigated.

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