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Ultraviolet Raman characterisation of diamond-like carbon films

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Published
  • George Adamopoulos
  • K.W.R Gilkes
  • J Robertson
  • N.M.J Conway
  • B.Y Kleinsorge
  • A Buckley
  • D.N Batchelder
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<mark>Journal publication date</mark>1999
<mark>Journal</mark>Diamond and Related Materials
Issue number2-5
Volume8
Number of pages4
Pages (from-to)541-544
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Diamond-like carbon (DLC) films with a range of sp(3) fractions have been examined by ultraviolet (UV) spectroscopy with 244 nm excitation. The UV Raman spectra of both hydrogenated and unhydrogenated films show the G peak near 1600 cm(-1) and a broad peak around 1200 cm(-1), which is attributed to C-C stretching vibrations of sp(3) sites. It is found that the ratio of the intensities of the C peak and the 1200 cm(-1) peak follows a universal dependence with the sp(3) content in both hydrogenated and unhydrogenated DLCs. This can be used for non-destructive evaluation of the sp(3) content of any DLC film.