Near-edge X-ray absorption fine-Structure, X-ray photoemission, and Fourier transform infrared spectroscopies of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films

Tsuyoshi Yoshitake, Akira Nagano, Shinya Ohmagari, Masaru Itakura, Noriyuki Kuwano, Ryota Ohtani, Hiroyuki Setoyama, Eiichi Kobayashi, Kunihito Nagayama

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The chemical bonding structure of ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a-C:H) composite films prepared by pulsed laser deposition was examined by near-edge X-ray absorption fine-structure (NEXAFS), X-ray photoemission, and Fourier transform infrared (FTIR) spectroscopies. An intense sp3-CH peak was observed in the FTIR spectrum. This implies that the sp3-CH peak originates from the grain boundaries between UNCD crystallites, wherein dangling bonds are terminated with hydrogen atoms. The presence of an intense σ*C-C peak in the NEXAFS spectrum and a narrow sp3 peak in the photoemission spectrum was specific to UNCD/a-C:H films; these confirm the existence of UNCD crystallites.

Original languageEnglish
Article number020222
JournalJapanese journal of applied physics
Volume48
Issue number2
DOIs
Publication statusPublished - Feb 2009

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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