Electromechanical modulations in transition metal dichalcogenide nanosheets: implications for environmental sensors
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Resumo
Transition metal dichalcogenides (TMDs) are key players in the two-dimensional materials nanoarena due to their
exquisite optoelectronic properties under a standard environment (room temperature and atmospheric pressure). Nevertheless, as
reported in the literature, they may also portray interesting physical properties under different environments. Here, we show two
distinct and significant electromechanical modulations in TMD nanosheets which are tuned by the environmental conditions
(applied pressure and adsorbents). Using scanning probe microscopy techniques, we modify the environmental conditions and
observe steplike rises in the electrical response of all studied TMDs (MoS 2 , WS 2, MoSe2, and WSe 2 - monolayers and few layers). Ab
initio calculations enable full understanding of specific mechanisms behind these electromechanical modulations, which may find
important applications in the design of TMD-based environmental sensors.
Abstract
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Scanning probe microscopy, Teoria do Funcional da Densidade, Pressão
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2D materials, Pressure-induced structural transition, Transition metal dichalcogenides, Scanning probe microscopy, Pressure
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https://pubs.acs.org/doi/10.1021/acsanm.1c03002