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Tribological Behavior of Sandwich-Like Self-Assembled Films Containing Silver Nanoparticles: The Influence of Outer Molecular Structure and Chain Length

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Alkanethiols with different chain length, composition and structure were grafted onto the surface of 3-mercaptopropyl trimethoxy silane (MPTS)–Ag dual-layer film consisting of Ag outerlayer and MPTS underlayer, thereby generating self-assembled trilayer films with “sandwich” structure on Si substrate. As-prepared films were characterized by atomic force microscopy and X-ray photoelectron spectroscopy. Moreover, the tribological behavior of as-prepared films was evaluated with an atomic force microscope and a ball-on-plate tribometer as well. It was found that as-prepared MPTS–Ag–C12 (C12 refer to 12 carbon chain of alkyl mercaptan; the same hereafter) film possesses excellent friction-reducing and antiwear properties. Particularly, MPTS–Ag–C8F (C8F refers to perfluorooctanethiol) film with lower interfacial energy exhibits a longer antiwear life than MPTS–Ag–C8 film.

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The authors acknowledge the financial support provided by the Ministry of Science and Technology of China (project of “973” Plan, Grant No. 2013CB632303), National Natural Science Foundation of China (Grant No. 51275154), and Program for Changjiang Scholars and Innovative Research Team in University (Grant No. PCS IRT1126).

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Correspondence to Pingyu Zhang.

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Yang, G., Jin, F., Yu, L. et al. Tribological Behavior of Sandwich-Like Self-Assembled Films Containing Silver Nanoparticles: The Influence of Outer Molecular Structure and Chain Length. Tribol Lett 57, 12 (2015). https://doi.org/10.1007/s11249-014-0459-0

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  • Self-assembly
  • Ag nanoparticles
  • “Sandwich” structure
  • Tribological properties