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Cited by 358Laser-Ablation Synthesis of Nanoparticles2D Materials and ApplicationsLaser-Matter Interactions and Applications

Preparation of Monolayer MoS2 Quantum Dots using Temporally Shaped Femtosecond Laser Ablation of Bulk MoS2 Targets in Water

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Li, Bo, Jiang, Lan, Li, Xin, Ran, Peng, Zuo, Pei, Wang, Andong, Qu, Liangti, Zhao, Yang +2 more·2017·Scientific Reports
DOI 10.1038/s41598-017-10632-3PMC PMC5593836
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Abstract

Abstract Zero-dimensional MoS2 quantum dots (QDs) possess distinct physical and chemical properties, which have garnered them considerable attention and facilitates their use in a broad range of applications. In this study, we prepared monolayer MoS2 QDs using temporally shaped femtosecond laser ablation of bulk MoS2 targets in water. The morphology, crystal structures, chemical, and optical properties of the MoS2 QDs were characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, UV–vis absorption spectra, and photoluminescence spectra. The analysis results show that highly pure, uniform, and monolayer MoS2 QDs can be successfully prepared. Moreover, by temporally shaping a conventional single pulse into a two-subpulse train, the production rate of MoS2 nanomaterials (including nanosheets, nanoparticles, and QDs) and the ratio of small size MoS2 QDs can be substantially improved. The underlying mechanism is a combination of multilevel photoexfoliation of monolayer MoS2 and water photoionization–enhanced light absorption. The as-prepared MoS2 QDs exhibit excellent electrocatalytic activity for hydrogen evolution reactions because of the abundant active edge sites, high specific surface area, and excellent electrical conductivity. Thus, this study provides a simple and green alternative strategy for the preparation of monolayer QDs of transition metal dichalcogenides or other layered materials.

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  • Due to the excellent purity of the prepared single-layered MoS2 quantum dots, it finds plausible electrocatalytic application toward hydrogen evolution reaction.

    “Due to the excellent purity of the prepared single-layered MoS2 quantum dots, it finds plausible electrocatalytic application toward hydrogen evolution reaction.”

    From Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications (2022) · cites this paper as [124]

    The Results and Discussion section reports high-purity monolayer MoS2 quantum dots and supports their potential for hydrogen-evolution electrocatalysis. But it does not attribute that potential to purity; the Introduction points instead to active edge sites, surface area, conductivity, and hydrogen adsorption. The Methods specify that the hydrogen-evolution tests used composites containing nanosheets, nanoparticles, and quantum dots, not isolated quantum dots. (LLM, conf=0.88)

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References 57 · Cited by 358

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Authors
Li, B., Jiang, L., Li, X., Ran, P., Zuo, P., Wang, A., Qu, L., Zhao, Y., Cheng, Z., & Lu, Y.
Affiliations
  • Beijing Institute of Technology (CN)
  • University of Nebraska–Lincoln (US)
Corresponding author
Jiang, Lan
ORCID
Venue
Scientific Reports
Publisher
Springer Science and Business Media LLC
Published
2017-09-11
Volume
7
Issue
1
Pages
11182-11182
ISSN
2045-2322 (ISSN-L)
DOI
10.1038/s41598-017-10632-3
PMC
PMC5593836
OpenAlex
W2753169497
Cited by
358
References
57
Citations by year
2026: 20 · 2025: 53 · 2024: 66 · 2023: 59 · 2022: 62 · 2021: 48 · 2020: 23 · 2019: 14 · 2018: 11 · 2017: 2
FWCI
6.16
Type
journal article
Language
en
Open access
Licence
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Lincoln (University of Nebraska) (submittedVersion, cc-by)
Funders
  • National Science Foundation
  • National Natural Science Foundation of China (863 Program, 2017YFB1104300, 51575053, 91323301)
  • National High-tech Research and Development Program (2015AA043504)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Laser-Ablation Synthesis of Nanoparticles
  • Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
Keywords
laser ablation in water, transition metal dichalcogenides, green synthesis of nanomaterials, edge sites

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