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Tribological Properties of New MoS2 Nanoparticles Prepared by Seed-Assisted Solution Technique

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Abstract

Seed-assisted solution synthesis of hollow IF-MoS2 nanoparticles allows independent control of particles size and MoS2 slabs crystallinity. Variations of the reaction mixture composition influence the particle size in the range 50–150 nm. As demonstrated by Rietvelt refinement of the X-ray diffraction patterns, the sulfide crystallinity depends only on the post-treatment temperature (350–750 °C) and not on the particle size. The tribological properties of new MoS2 nanoparticles prepared by seed-assisted solution technique were investigated and showed a strong decrease in the friction coefficient and wear compared with base oil. Small particles of 50–60-nm size showed the best results. The particle size above 100 nm is deleterious for the lubrication properties since it hinders particles penetration into the contact zone. MoS2 slabs crystallinity had lesser influence on the lubrication efficiency. However, less-crystallized samples treated at 350 °C showed better lubrication, apparently because of easier exfoliation of the individual MoS2 slabs, leading to more efficient formation of tribofilm.

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Acknowledgments

This work was supported by the LABEX iMUST (ANR-10-LABX-0064) of Université de Lyon, within the program “Investissements d’Avenir” (ANR-11-IDEX-0007) operated by the French National Research Agency (ANR).

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Authors and Affiliations

  1. Ecole Centrale de Lyon, LTDS, Bât H10, 36 Avenue Guy de Collonge, 69134, Ecully, France

    Paule Njiwa, Béatrice Vacher, Michel Belin, Thierry Le Mogne & Fabrice Dassenoy

  2. Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 556 CNRS-Université Lyon, 1, 2 Avenue A. Einstein, 69626, Villeurbanne, France

    Aurélie Hadj-Aïssa, Pavel Afanasiev, Christophe Geantet & Françoise Bosselet

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  1. Paule Njiwa
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  2. Aurélie Hadj-Aïssa
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  3. Pavel Afanasiev
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  4. Christophe Geantet
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  6. Béatrice Vacher
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  7. Michel Belin
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  8. Thierry Le Mogne
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  9. Fabrice Dassenoy
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Correspondence to Fabrice Dassenoy.

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Njiwa, P., Hadj-Aïssa, A., Afanasiev, P. et al. Tribological Properties of New MoS2 Nanoparticles Prepared by Seed-Assisted Solution Technique. Tribol Lett 55, 473–481 (2014). https://doi.org/10.1007/s11249-014-0380-6

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  • DOI: https://doi.org/10.1007/s11249-014-0380-6

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