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Raman spectroscopy on amorphous carbon films

Schwan, J, Ulrich, S, Batori, V, Ehrhardt, H and Silva, SRP (1996) Raman spectroscopy on amorphous carbon films JOURNAL OF APPLIED PHYSICS, 80 (1). 440 - 447. ISSN 0021-8979

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The origin and interpretation of the Raman features of amorphous ~hydrogenated! carbon films deposited at room temperature in the region of 1000–1700 cm21 is discussed in this paper. Possible interpretations of the linewidths, positions of the ‘‘G’’ graphite peak and ‘‘D’’ disordered peak, and their intensity ratios are examined using results obtained from magnetron sputtered and magnetic field enhanced plasma deposited films. It is shown that even small ‘‘clusters’’ of condensed benzene rings ~cluster size below 20 Å! in carbon films can explain the observed Raman scattering. Besides the care that should be taken in the correct interpretation of Raman results, the utility of Raman scattering in obtaining an estimate of cluster sizes in amorphous ~hydrogenated! carbon films is discussed. Carbon films prepared by magnetron sputtering show two additional Raman features at 1180 and 1490 cm21 in addition to the G and D peaks. It is shown that a correlation exists between the 1180 cm21 peak and the sp3 content in the films.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Applied, Physics, THIN-FILMS, DIAMONDLIKE CARBON, SCATTERING, GRAPHITE
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Melanie Hughes
Date Deposited: 29 Sep 2010 09:32
Last Modified: 23 Sep 2013 18:38

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