Friction reduction mechanism of hydrogen- and fluorine-terminated diamond-like carbon films investigated by molecular dynamics and quantum chemical calculation

Shandan Bai, Tasuku Onodera, Ryo Nagumo, Ryuji Miura, Ai Suzuki, Hideyuki Tsuboi, Nozomu Hatakeyama, Hiromitsu Takaba, Momoji Kubo, Akira Miyamoto

研究成果: Article査読

51 被引用数 (Scopus)

抄録

The friction reduction mechanisms of diamond-like carbon (DLC) and H- or F-terminated DLC films were investigated using molecular dynamics (MD) and tight-binding quantum chemistry (TBQC) calculations. Atomistic-scale friction dynamics of both DLC and the surface-terminated DLC model in which the unsaturated bonds on their surface were terminated with H or F atoms were investigated by MD. The F-terminated DLC model showed lower friction than that of the H-terminated DLC model because of the stronger repulsive Coulombic force between F atoms at the surfaces. On the other hand, strong van der Waals interaction acting on the interface was observed for the H-terminated DLC model compared to that for the F-terminated DLC models. TBQC calculation indicates a bonding interaction between the surfaces of DLC, while the antibonding interaction was observed for the surface-terminated DLC model. Those interactions would make the difference in the friction properties among the studied models.

本文言語English
ページ(範囲)12559-12565
ページ数7
ジャーナルJournal of Physical Chemistry C
116
23
DOI
出版ステータスPublished - 2012 6 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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