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

32 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 1 2009

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Carbon films
Amorphous carbon
X ray absorption
Photoemission
Composite films
Fourier transform infrared spectroscopy
Diamonds
photoelectric emission
fine structure
diamonds
infrared spectroscopy
X rays
composite materials
carbon
Crystallites
crystallites
x rays
methylidyne
Dangling bonds
Pulsed laser deposition

All Science Journal Classification (ASJC) codes

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

Cite this

Near-edge X-ray absorption fine-Structure, X-ray photoemission, and Fourier transform infrared spectroscopies of ultrananocrystalline diamond/hydrogenated amorphous carbon composite films. / Yoshitake, Tsuyoshi; Nagano, Akira; Ohmagari, Shinya; Itakura, Masaru; Kuwano, Noriyuki; Ohtani, Ryota; Setoyama, Hiroyuki; Kobayashi, Eiichi; Nagayama, Kunihito.

In: Japanese journal of applied physics, Vol. 48, No. 2, 020222, 01.02.2009.

Research output: Contribution to journalArticle

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AU - Nagano, Akira

AU - Ohmagari, Shinya

AU - Itakura, Masaru

AU - Kuwano, Noriyuki

AU - Ohtani, Ryota

AU - Setoyama, Hiroyuki

AU - Kobayashi, Eiichi

AU - Nagayama, Kunihito

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AB - 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.

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