Pereira, Neuma das MercêsRezende, Natália PereiraCunha, Thiago Henrique Rodrigues daBarboza, Ana Paula MoreiraSilva, Glaura GoulartLippross, DanielNeves, Bernardo Ruegger AlmeidaChacham, HelioFerlauto, Andre SantarosaLacerda, Rodrigo Gribel2023-01-182023-01-182022PEREIRA, N. M. et al. Aerosol-printed MoS2 ink as a high sensitivity humidity sensor. ACS Omega, v. 7, p. 9388-9396, 2022. Disponível em: <https://pubs.acs.org/doi/10.1021/acsomega.1c06525>. Acesso em: 06 jul. 2022.2470-1343http://www.repositorio.ufop.br/jspui/handle/123456789/15990Molybdenum 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.en-USabertoArtigo publicado em periodicoThis is an open-access article distributed under the terms of the Creative Commons Attribution License. Fonte: o PDF do artigo.https://doi.org/10.1021/acsomega.1c06525