Mild Temperature Thermal Treatments of Gold-Exfoliated Monolayer MoS2

Monolayer molybdenum disulfide is considered an extremely promising two-dimensional material for innovative electronics due to its direct bandgap and high charge-carrier mobility. The optical and electronic properties of monolayer MoS<sub>2</sub> can, however, be strongly influenced by the specific synthesis route, posing challenges for industrial-scale production. In this study, we investigated the effects of moderate temperature thermal treatments under a controlled O<sub>2</sub> atmosphere on the properties of monolayer MoS<sub>2</sub> flakes. We found that the treatments can effectively tune the doping level of monolayer MoS<sub>2</sub>. Notably, 225 °C was identified as the optimal temperature for enhancing its optical emission properties. Our findings suggest that the removal of sulfur vacancies and impurities underlies these effects, demonstrating a promising approach for tuning the properties of monolayer MoS<sub>2</sub> at mild temperatures.

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Publication Details

Journal
Nanomaterials
Published
2025-01-22
DOI
https://doi.org/10.3390/nano15030160
Citations
2
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
1.04

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article

Mild Temperature Thermal Treatments of Gold-Exfoliated Monolayer MoS2

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2 citations
Nanomaterials
2D Materials and Applications
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article

Mild Temperature Thermal Treatments of Gold-Exfoliated Monolayer MoS2

F. M. Gelardi, Viktória Kovács Kis, Emanuele Sangiorgi, M. Cannas, Igor Píš, Filippo Giannazzo, Salvatore Ethan Panasci, Emanuela Schilirò, Gianpiero Buscarino, B. Pécz, Federica Bondino, Antonino Madonia, S. Agnello, G. Radnóczi, Gianmarco Laurella
article en
2 citations

Abstract

Monolayer molybdenum disulfide is considered an extremely promising two-dimensional material for innovative electronics due to its direct bandgap and high charge-carrier mobility. The optical and electronic properties of monolayer MoS<sub>2</sub> can, however, be strongly influenced by the specific synthesis route, posing challenges for industrial-scale production. In this study, we investigated the effects of moderate temperature thermal treatments under a controlled O<sub>2</sub> atmosphere on the properties of monolayer MoS<sub>2</sub> flakes. We found that the treatments can effectively tune the doping level of monolayer MoS<sub>2</sub>. Notably, 225 °C was identified as the optimal temperature for enhancing its optical emission properties. Our findings suggest that the removal of sulfur vacancies and impurities underlies these effects, demonstrating a promising approach for tuning the properties of monolayer MoS<sub>2</sub> at mild temperatures.

NanomaterialsVol. 15(3)
Istituto Officina dei Materiali (IT), HUN-REN Centre for Energy Research (HU), Institute for Microelectronics and Microsystems (IT), University of Palermo (IT)
European Commission
Industry, innovation and infrastructure
Openalex Percentile: Top 28%
2D Materials and Applications
1.04
DOIOpen Access PDFOpenAlex
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