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Title: Aerosol-printed MoS2 ink as a high sensitivity humidity sensor.
Authors: Pereira, Neuma das Mercês
Rezende, Natália Pereira
Cunha, Thiago Henrique Rodrigues da
Barboza, Ana Paula Moreira
Silva, Glaura Goulart
Lippross, Daniel
Neves, Bernardo Ruegger Almeida
Chacham, Helio
Ferlauto, Andre Santarosa
Lacerda, Rodrigo Gribel
Issue Date: 2022
Citation: PEREIRA, N. M. et al. Aerosol-printed MoS2 ink as a high sensitivity humidity sensor. ACS Omega, v. 7, p. 9388-9396, 2022. Disponível em: <>. Acesso em: 06 jul. 2022.
Abstract: Molybdenum disulfide (MoS2) is attractive for use in nextgeneration nanoelectronic devices and exhibits great potential for humidity sensing applications. Herein, MoS2 ink was successfully prepared via a simple exfoliation method by sonication. The structural and surface morphology of a deposited ink film was analyzed by scanning electron microscopy (SEM), Raman spectroscopy, and atomic force microscopy (AFM). The aerosol-printed MoS2 ink sensor has high sensitivity, with a conductivity increase by 6 orders of magnitude upon relative humidity increase from 10 to 95% at room temperature. The sensor also has fast response/recovery times and excellent repeatability. Possible mechanisms for the water-induced conductivity increase are discussed. An analytical model that encompasses two ionic conduction regimes, with a percolation transition to an insulating state below a low humidity threshold, describes the sensor response successfully. In conclusion, our work provides a low-cost and straightforward strategy for fabricating a highperformance humidity sensor and fundamental insights into the sensing mechanism.
ISSN: 2470-1343
metadata.dc.rights.license: This is an open-access article distributed under the terms of the Creative Commons Attribution License. Fonte: o PDF do artigo.
Appears in Collections:DEFIS - Artigos publicados em periódicos

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