Inverse Layer Dependence of Friction on Re-doped MoS<sub>2</sub> Revealed by Atomic Force Microscopy

ORAL

Abstract

The possibility to tune the nanoscale frictional properties of two-dimensional (2D) materials via chemical doping is of considerable scientific and technological interest. Here, we present the results of atomic-force-microscopy-based friction measurements on Re-doped molybdenum disulfide (MoS2) [arXiv:2007.05805]. In stark contrast to the seemingly universal observation of decreasing friction with increasing number of layers on 2D materials, friction on Re-doped MoS2 exhibits an anomalous, i.e. inverse, dependency on the number of layers. Raman spectroscopy measurements reveal signatures of Re intercalation, providing clues regarding the physical mechanisms that result in this remarkable observation (see abstract of Strubbe et al.).

*This work was supported by the Merced Nanomaterials Center for Energy and Sensing (MACES) via the National Aeronautics and Space Administration (NASA) Grant No. NNX15AQ01.

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Publication: Acikgoz et al., arXiv:2007.05805 (2020)

Presenters

  • Mehmet Z Baykara

    • University of California, Merced

Authors

  • Mehmet Z Baykara

    • University of California, Merced

  • Ogulcan Acikgoz

    • University of California, Merced

  • Enrique Guerrero

    • University of California, Merced

  • Alper Yanilmaz

    • Izmir Institute of Technology, Turkey
    • Izmir Institute of Technology

  • Omur E Dagdeviren

    • McGill University and University of Québec, Canada
    • McGill University

  • Cem Celebi

    • Izmir Institute of Technology

  • David A Strubbe

    • University of California, Merced