Electromechanical Modulations in Transition Metal Dichalcogenide Nanosheets: Implications for Environmental Sensors

Mauricio V. Bessa, Wellington D. Freitas, Natália Paz Neme, Luiz G. P. Martins, Ana P. M. Barboza, Matheus J. S. Matos, Mario S. C. Mazzoni, Bernardo R. A. Neves*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

20 Downloads (Pure)


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 (MoS2, WS2, MoSe2, and WSe2—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.
Originele taal-2English
Pagina's (van-tot)11305-11311
Aantal pagina's6
TijdschriftACS Applied Nano Materials
Nummer van het tijdschrift10
Vroegere onlinedatum6-okt-2021
StatusPublished - 22-okt-2021

Citeer dit