Chemical analysis of ultrathin DLC films and lubricant/DLC interface using plasmonic sensors

M. Yanagisawa, M. Kunimoto, T. Homma

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The technical potential of a new plasmonic sensor, which can acquire surface-enhanced Raman spectra with high sensitivity by controlling surface plasmons is demonstrated for the chemical analysis of diamond-like carbon (DLC) films, lubricant films, and the DLC/lubricant interface on magnetic disks of sub-nanometer scale. The Raman spectra of thin DLC films and lubricated DLC carbon can be acquired with a high S/N ratio. Raman spectra of lubricated DLC carbon can also be acquired with the high S/N ratio. The wavenumber shift and intensity change of the Raman peaks of the phenyl and hydroxyl groups in the mixed lubricants (ADOH and Z-tetraol) show that the chemical interaction with the DLC surfaces of the phenyl group in the lubricant molecule decreases with increasing nitrogen content, whereas that of the hydroxyl group with the nitrogenated carbon increases. Raman spectra of nitrogenated DLC films are also acquired, the peaks show good agreement with density functional theory calculations. The calculated bonding energy indicates that the hydroxyl groups interact with the nitrogenated carbon.

Original languageEnglish
Title of host publicationASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014
PublisherWeb Portal ASME (American Society of Mechanical Engineers)
ISBN (Electronic)9780791845790
DOIs
Publication statusPublished - 2014 Jan 1
EventASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014 - Santa Clara, United States
Duration: 2014 Jun 232014 Jun 24

Publication series

NameASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014

Conference

ConferenceASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014
CountryUnited States
CitySanta Clara
Period14/6/2314/6/24

Keywords

  • DLC film
  • Lubricant
  • Magnetic disk
  • Plasmonic sensor
  • Surface-enhanced Raman scattering
  • Tribology

ASJC Scopus subject areas

  • Information Systems
  • Control and Systems Engineering
  • Hardware and Architecture

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  • Cite this

    Yanagisawa, M., Kunimoto, M., & Homma, T. (2014). Chemical analysis of ultrathin DLC films and lubricant/DLC interface using plasmonic sensors. In ASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014 (ASME 2014 Conference on Information Storage and Processing Systems, ISPS 2014). Web Portal ASME (American Society of Mechanical Engineers). https://doi.org/10.1115/ISPS2014-6908