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Quantitative Studies of Tetrahedral Bonding in Amorphous Carbon Films Using Ultraviolet Raman Spectroscopy

Published online by Cambridge University Press:  10 February 2011

K. W. R. Gilkes ,
S. Prawer ,
J. Robertson  and
H. S. Sands
K. W. R. Gilkes
Affiliation:
School of Physics, University of East Anglia, Norwich NR4 7TJ, UK, k.gilkes@uea.ac.uk
S. Prawer
Affiliation:
School of Physics, University of Melbourne, Parkville, VIC 3052, Australia
J. Robertson
Affiliation:
Engineering Department, Trumpington Street, Cambridge CB2 1PZ, UK
H. S. Sands
Affiliation:
Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
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Abstract

The bonding in a series of unhydrogenated amorphous carbon films has been analysed quantitatively using Raman spectroscopy with ultraviolet excitation. The Raman spectra exhibit two broad Raman peaks at 1650 cm−1 and 1100 cm−1, due to sp2 and sp3 vibrational modes respectively. The former is a resonance feature associated with a large proportion of paired sp2 sites, while the latter is a weighted vibrational density-of-states for the distorted random network of sp3 sites. The position and relative intensity of the two peaks are shown to be strongly correlated with the percentage of sp3 sites in the films, providing a reliable measure of sp3 bonding which is both quantitative and non-destructive.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 498: Symposium AA – Covalently Bonded Disordered Thin-Film Materials , 1997 , 49
Copyright
Copyright © Materials Research Society 1998

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References

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