Raman and infrared modes of hydrogenated amorphous carbon nitride
Por:
Rodil S.E., Ferrari A.C., Robertson J., Milne W.I.
Publicada:
1 ene 2001
Resumen:
Features in the Raman and infrared (IR) spectra of highly sp3 bonded hydrogenated amorphous carbon nitride films are assigned. The Raman spectra show three main features all found in a-C itself, the G and D peaks at 1550 and 1350 cm-1, respectively, and the L peak near 700 cm-1. The intensity ratio of the D and G peaks, I(D)/I(G), is found to scale as (band gap)-2, which confirms that nitrogen induces carbon to form sp2 graphitic clusters. The intensity of the L mode is found to scale with the D mode, supporting its identification as an in-plane rotational mode of sixfold rings in graphitic clusters. A small feature at 2200 cm-1 due to C?N modes is seen, but otherwise the Raman spectra resembles that of a-C and shows no specific features due to N atoms. The hydrogen content is found to have a strong effect on the IR spectra at 1100-1600 cm-1 making this band asymmetric towards the 1600 cm-1 region. © 2001 American Institute of Physics.
Filiaciones:
Rodil S.E.:
Engineering Department, Cambridge University, Cambridge CB2 1PZ, United Kingdom
Ferrari A.C.:
Engineering Department, Cambridge University, Cambridge CB2 1PZ, United Kingdom
Robertson J.:
Engineering Department, Cambridge University, Cambridge CB2 1PZ, United Kingdom
Milne W.I.:
Engineering Department, Cambridge University, Cambridge CB2 1PZ, United Kingdom
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