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Grant support

We acknowledge financial support from the Spanish Ministry of Science, Innovation and Universities & the State Research Agency MICIU/AEI/10.13039/501100011033 (through the "Maria de Maeztu" Programme for Units of Excellence in R&D (CEX2018-000805-M), projects PID2019-106268GB-C31, TED2021-132219A-I00, PID2022-139191OB-C31, TED2021-130830B-C41, PID2022-138908NB-C32, and PID2022-142331NB-I00, and the Ramon y Cajal fellowship RYC2020-030302-I) and from the Comunidad de Madrid and Universidad Autonoma de Madrid (SI3-PJI-2021-00479).

Analysis of institutional authors

Zambudio, AitorAuthorLopez-Polin, GuillermoAuthorAres, PabloAuthorGomez-Herrero, JulioAuthorGomez-Navarro, CristinaCorresponding Author
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Article

High frictional resilience of MoS2 nanosheets to induced atomic vacancies: implications for nanoelectromechanical devices

Publicated to:ACS APPLIED NANO MATERIALS. 7 (8): 9712-9719 - 2024-04-15 7(8), DOI: 10.1021/acsanm.4c01561

Authors: Zambudio, A.; López-Polín, G.; Ares, P.; Colchero, J.; Gómez-Herrero, J.; Gómez-Navarro, C.

Affiliations

Univ Autonoma Madrid, Condensed Matter Phys Dept, Madrid 28049, Spain - Author
Univ Autonoma Madrid, Dept Fis Mat, Canto Blanco 28049, Spain - Author
Univ Autonoma Madrid, IFIMAC Condensed Matter Phys Ctr, Canto Blanco 28049, Spain - Author
Univ Murcia, Opt & Nanophys Res Ctr, Murcia 30100, Spain - Author

Abstract

Molybdenum disulfide (MoS2) exhibits exceptional mechanical and wear properties combined with thermal stability, which makes it an outstanding solid lubricant. While numerous studies have reported on the tribological behavior of few-layer pristine MoS2, little attention has been given to the impact of defects, such as sulfur vacancies, which are inevitable during large-scale fabrications. Understanding the factors that affect friction at the atomic level is essential for the design and optimization of high-performance materials. Here, we present a systematic study of the tribology of one- and two-layer MoS2 nanosheets, with controllably introduced atomic vacancies, performed by atomic force microscopy. We find that the friction coefficient of mono- and bilayer MoS2 suffers more than a 3-fold increase from the as-prepared layer (with an initial defect density of 1 x 10(12) cm(-2)) to those with an induced atomic defect density of 1.2 x 10(13) cm(-2). Comparison of the results reported here with analogous results in graphene shows that MoS2 presents an attractive high resilience of the friction coefficient to monatomic defect generation in the atomic defect density range typically obtained by scalable techniques.

Keywords
2d materialsContacDefectsFrictionLateral force microscopyMos 2Mos2PhotoluminescenceTransistorsTribologTribologyVacancy

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal ACS APPLIED NANO MATERIALS due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Materials Science (Miscellaneous).

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-05-11:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 8.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 8 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 4.55.
  • The number of mentions on the social network X (formerly Twitter): 7 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (ZAMBUDIO SEPULVEDA, AITOR) and Last Author (GOMEZ-NAVARRO GONZALEZ, CRISTINA).

the author responsible for correspondence tasks has been GOMEZ-NAVARRO GONZALEZ, CRISTINA.