Slippery and Wear-Resistant Surfaces Enabled by Interface Engineered Graphene

Neeraj Dwivedi, Tarak Patra, Jae Bok Lee, Reuben J. Yeo, Srilok Srinivasan, Tanmay Dutta, Kiran Sasikumar, Chetna Dhand, Sudhiranjan Tripathy, Mohammad S.M. Saifullah, Aaron Danner, S. A.R. Hashmi, A. K. Srivastava, Jong Hyun Ahn, Subramanian K.R.S. Sankaranarayanan, Hyunsoo Yang, Charanjit S. Bhatia

Research output: Contribution to journalArticle

Abstract

Friction and wear remain the primary cause of mechanical energy dissipation and system failure. Recent studies reveal graphene as a powerful solid lubricant to combat friction and wear. Most of these studies have focused on nanoscale tribology and have been limited to a few specific surfaces. Here, we uncover many unknown aspects of graphene's contact-sliding at micro- A nd macroscopic tribo-scales over a broader range of surfaces. We discover that graphene's performance reduces for surfaces with increasing roughness. To overcome this, we introduce a new type of graphene/silicon nitride (SiNx, 3 nm) bilayer overcoats that exhibit superior performance compared to native graphene sheets (mono and bilayer), that is, display the lowest microscale friction and wear on a range of tribologically poor flat surfaces. More importantly, two-layer graphene/SiNx bilayer lubricant (<4 nm in total thickness) shows the highest macroscale wear durability on tape-head (topologically variant surface) that exceeds most previous thicker (â¼7-100 nm) overcoats. Detailed nanoscale characterization and atomistic simulations explain the origin of the reduced friction and wear arising from these nanoscale coatings. Overall, this study demonstrates that engineered graphene-based coatings can outperform conventional coatings in a number of technologies.

Original languageEnglish
Pages (from-to)905-917
Number of pages13
JournalNano letters
Volume20
Issue number2
DOIs
Publication statusPublished - 2020 Feb 12

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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  • Cite this

    Dwivedi, N., Patra, T., Lee, J. B., Yeo, R. J., Srinivasan, S., Dutta, T., Sasikumar, K., Dhand, C., Tripathy, S., Saifullah, M. S. M., Danner, A., Hashmi, S. A. R., Srivastava, A. K., Ahn, J. H., Sankaranarayanan, S. K. R. S., Yang, H., & Bhatia, C. S. (2020). Slippery and Wear-Resistant Surfaces Enabled by Interface Engineered Graphene. Nano letters, 20(2), 905-917. https://doi.org/10.1021/acs.nanolett.9b03650