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Raman spectra of diamondlike amorphous carbon films

Journal of Applied Physics, ISSN: 0021-8979, Vol: 64, Issue: 11, Page: 6464-6468
1988
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  • 61
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Metrics Details

  • Citations
    264
    • Citation Indexes
      264
  • Captures
    61

Article Description

Raman spectra of diamondlike amorphous carbon (a-C) films prepared under atmosphere with various hydrogen gas content have been measured as a function of excitation wavelength. The Raman spectral profiles vary with excitation wavelength depending on electronic absorption spectra associated with π-π* electronic transitions. Dependence of Raman spectra on excitation wavelength is interpreted in terms of π-π* resonant Raman scattering from aromatic rings with various sizes rather than polyene chains. The relative intensity of a 1400 cm band against a 1530 cm band is found to decrease with an increase of sp content in a-C films. It is shown that the relative intensity can be used as a parameter for sp content.

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