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Colloidal continuous injection synthesis of fluorescent MoX2 (X = S, Se) nanosheets as a first step toward photonic applications

Gabriele Pippia, Anastasia Rousaki (UGent) , Matteo Barbone, Jonas Billet, Rosaria Brescia, Anatolii Polovitsyn, Beatriz Martín-García, Mirko Prato, Francesco De Boni, Marko M. Petrić, et al.
(2022) ACS APPLIED NANO MATERIALS. 5(8). p.10311-10320
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Abstract
Transition-metal dichalcogenide (TMD) nano-sheets have become an intensively investigated topic in the field of 2D nanomaterials, especially due to the direct semiconductor nature, and the broken inversion symmetry in the odd-layer number, of some of their family members. These properties make TMDs attractive for different technological applications such as photovoltaics, optoelectronics, valleytronics, and hydrogen evolu-tion reactions. Among them, MoX2 (X = S and Se) are turned to direct gap when their thickness is thinned down to monolayer, and thus, efforts toward obtaining large-scale monolayer TMDs are crucial for technological applications. Colloidal synthesis of TMDs has been developed in recent years, as it provides a cost-efficient and scalable way to produce few-layer TMDs having homogeneous size and thickness, yet obtaining a monolayer has proven challenging. Here, we present a method for the colloidal synthesis of mono-and few-layer MoX2 (X = S and Se) using elemental chalcogenide and metal chloride as precursors. Using a synthesis with slow injection of the MoCl5 precursor under a nitrogen atmosphere, and optimizing the synthesis parameters with a design of experiments approach, we obtained a MoX2 sample with the semiconducting (1H) phase and optical band gaps of 1.96 eV for H-1-MoS2 and 1.67 eV for 1H-MoSe2, respectively, consistent with a large monolayer yield in the ensemble. Both display photoluminescence at cryogenic and room temperature, paving the way for optical spectroscopy studies and photonic applications of colloidal TMD nanosheets.
Keywords
General Materials Science, colloidal synthesis, transition metal dichalcogenide, design of experiments, molybdenum disulfide, molybdenum diselenide, LIQUID-PHASE EXFOLIATION, LARGE-AREA SYNTHESIS, FEW-LAYER MOS2, MONOLAYER, METAL, PHOTOLUMINESCENCE, TRANSITION, GROWTH, RAMAN, WS2

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Citation

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MLA
Pippia, Gabriele, et al. “Colloidal Continuous Injection Synthesis of Fluorescent MoX2 (X = S, Se) Nanosheets as a First Step toward Photonic Applications.” ACS APPLIED NANO MATERIALS, vol. 5, no. 8, 2022, pp. 10311–20, doi:10.1021/acsanm.2c01470.
APA
Pippia, G., Rousaki, A., Barbone, M., Billet, J., Brescia, R., Polovitsyn, A., … Moreels, I. (2022). Colloidal continuous injection synthesis of fluorescent MoX2 (X = S, Se) nanosheets as a first step toward photonic applications. ACS APPLIED NANO MATERIALS, 5(8), 10311–10320. https://doi.org/10.1021/acsanm.2c01470
Chicago author-date
Pippia, Gabriele, Anastasia Rousaki, Matteo Barbone, Jonas Billet, Rosaria Brescia, Anatolii Polovitsyn, Beatriz Martín-García, et al. 2022. “Colloidal Continuous Injection Synthesis of Fluorescent MoX2 (X = S, Se) Nanosheets as a First Step toward Photonic Applications.” ACS APPLIED NANO MATERIALS 5 (8): 10311–20. https://doi.org/10.1021/acsanm.2c01470.
Chicago author-date (all authors)
Pippia, Gabriele, Anastasia Rousaki, Matteo Barbone, Jonas Billet, Rosaria Brescia, Anatolii Polovitsyn, Beatriz Martín-García, Mirko Prato, Francesco De Boni, Marko M. Petrić, Amine Ben Mhenni, Isabel Van Driessche, Peter Vandenabeele, Kai Müller, and Iwan Moreels. 2022. “Colloidal Continuous Injection Synthesis of Fluorescent MoX2 (X = S, Se) Nanosheets as a First Step toward Photonic Applications.” ACS APPLIED NANO MATERIALS 5 (8): 10311–10320. doi:10.1021/acsanm.2c01470.
Vancouver
1.
Pippia G, Rousaki A, Barbone M, Billet J, Brescia R, Polovitsyn A, et al. Colloidal continuous injection synthesis of fluorescent MoX2 (X = S, Se) nanosheets as a first step toward photonic applications. ACS APPLIED NANO MATERIALS. 2022;5(8):10311–20.
IEEE
[1]
G. Pippia et al., “Colloidal continuous injection synthesis of fluorescent MoX2 (X = S, Se) nanosheets as a first step toward photonic applications,” ACS APPLIED NANO MATERIALS, vol. 5, no. 8, pp. 10311–10320, 2022.
@article{01GJZAG2B63VKR08WAS4RR7DP1,
  abstract     = {{Transition-metal dichalcogenide (TMD) nano-sheets have become an intensively investigated topic in the field of 2D nanomaterials, especially due to the direct semiconductor nature, and the broken inversion symmetry in the odd-layer number, of some of their family members. These properties make TMDs attractive for different technological applications such as photovoltaics, optoelectronics, valleytronics, and hydrogen evolu-tion reactions. Among them, MoX2 (X = S and Se) are turned to direct gap when their thickness is thinned down to monolayer, and thus, efforts toward obtaining large-scale monolayer TMDs are crucial for technological applications. Colloidal synthesis of TMDs has been developed in recent years, as it provides a cost-efficient and scalable way to produce few-layer TMDs having homogeneous size and thickness, yet obtaining a monolayer has proven challenging. Here, we present a method for the colloidal synthesis of mono-and few-layer MoX2 (X = S and Se) using elemental chalcogenide and metal chloride as precursors. Using a synthesis with slow injection of the MoCl5 precursor under a nitrogen atmosphere, and optimizing the synthesis parameters with a design of experiments approach, we obtained a MoX2 sample with the semiconducting (1H) phase and optical band gaps of 1.96 eV for H-1-MoS2 and 1.67 eV for 1H-MoSe2, respectively, consistent with a large monolayer yield in the ensemble. Both display photoluminescence at cryogenic and room temperature, paving the way for optical spectroscopy studies and photonic applications of colloidal TMD nanosheets.}},
  author       = {{Pippia, Gabriele and Rousaki, Anastasia and Barbone, Matteo and Billet, Jonas and Brescia, Rosaria and Polovitsyn, Anatolii and Martín-García, Beatriz and Prato, Mirko and De Boni, Francesco and Petrić, Marko M. and Ben Mhenni, Amine and Van Driessche, Isabel and Vandenabeele, Peter and Müller, Kai and Moreels, Iwan}},
  issn         = {{2574-0970}},
  journal      = {{ACS APPLIED NANO MATERIALS}},
  keywords     = {{General Materials Science,colloidal synthesis,transition metal dichalcogenide,design of experiments,molybdenum disulfide,molybdenum diselenide,LIQUID-PHASE EXFOLIATION,LARGE-AREA SYNTHESIS,FEW-LAYER MOS2,MONOLAYER,METAL,PHOTOLUMINESCENCE,TRANSITION,GROWTH,RAMAN,WS2}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{10311--10320}},
  title        = {{Colloidal continuous injection synthesis of fluorescent MoX2 (X = S, Se) nanosheets as a first step toward photonic applications}},
  url          = {{http://doi.org/10.1021/acsanm.2c01470}},
  volume       = {{5}},
  year         = {{2022}},
}
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