Direct observation of sp3 bonding in tetrahedral amorphous carbon using ultraviolet Raman spectroscopy
1997; American Institute of Physics; Volume: 70; Issue: 15 Linguagem: Inglês
10.1063/1.118798
ISSN1520-8842
AutoresK. W. R. Gilkes, H. S. Sands, D. N. Batchelder, John Robertson, WI Milne,
Tópico(s)Carbon Nanotubes in Composites
ResumoThe vibrational modes of the sp3 sites in tetrahedral amorphous carbon (ta-C) thin films are revealed directly using ultraviolet Raman spectroscopy at 244 nm excitation and are shown to produce a Raman peak centered around 1100 cm−1. In addition, the main Raman peak associated with sp2 vibrational modes is shifted upward in frequency by 100 cm−1 relative to its position in spectra excited at 514 nm. The spectra are interpreted in terms of the bonding in ta-C.
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