DataVXACS Applied Nano MaterialsPaper
journal article·2021-10-22Open access

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

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

ACS Applied Nano Materials· Volume 4· Issue 10
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Source abstract

Abstract

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.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Departamento de Física, Universidade Federal de Ouro Preto, 35400-000, Ouro Preto, MG, Brazil

Centro de Microscopia, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil

Centro Federal de Educação Tecnológica de Minas Gerais, CEFET-MG, 30421-169 Belo Horizonte, MG, Brazil

Zernike Institute for Advanced Materials and Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands

Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States

Departamento de Física, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil

Funding

Funda????o de Amparo ?? Pesquisa do Estado de Minas Gerais · Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico

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