Role of OH Termination in Mitigating Friction of Diamond-like Carbon under High Load: A Joint Simulation and Experimental Study

Yang Wang, Kentaro Hayashi, Yusuke Ootani, Shandan Bai, Tomomi Shimazaki, Yuji Higuchi, Nobuki Ozawa, Koshi Adachi, Maria Isabel De Barros Bouchet, Jean Michel Martin, Momoji Kubo

Research output: Contribution to journalArticlepeer-review

Abstract

Diamond-like carbon (DLC) has recently attracted much attention as a promising solid-state lubricant because it exhibits low friction, low abrasion, and high wear resistance. Although we previously reported the reason why H-terminated DLC exhibits low friction based on a tight-binding quantum chemical molecular dynamics (TB-QCMD) simulation, experimentally, the low-friction state of H-terminated DLC is not stable, limiting its application. In the present work, our TB-QCMD simulations suggest that H/OH-terminated DLC could give low friction even under high loads, whereas H-terminated DLC could not. By using gas-phase friction experiments, we confirm that OH termination can indeed provide much more stable lubricity than H termination, validating the predictions from simulations. We conclude that H/OH-terminated DLC is a new low-friction material with high load capacity and high stable lubricity that may be suitable for practical use in industrial applications.

Original languageEnglish
Pages (from-to)6292-6300
Number of pages9
JournalLangmuir
Volume37
Issue number20
DOIs
Publication statusPublished - 2021 May 25

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint

Dive into the research topics of 'Role of OH Termination in Mitigating Friction of Diamond-like Carbon under High Load: A Joint Simulation and Experimental Study'. Together they form a unique fingerprint.

Cite this