Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342l..47s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 342, July 1, 1989, p. L47-L50.
Astronomy and Astrophysics
Astronomy
7
Amorphous Materials, Carbon, Cosmic Dust, Interstellar Matter, Nitrogen Plasma, Aromatic Compounds, Cyclic Hydrocarbons, Infrared Sources (Astronomy), Infrared Spectra
Scientific paper
Recent measurements of plasma-generated amorphous carbon films (a:C-H and a:C) show that nitrogen doping of the carbon imparts IR activity to the films. In particular, the Raman G and D bands which are IR inactive in typical amorphous carbons become active when nitrogen is substituted for carbon. When the nitrogen dopant level is in the range of 15-20 pct of the carbon, the G and D bands are more than 3-4 times the size of any other IR feature. It is suggested that the IR emission observed from carbon dust may have a significant component which arises from nitrogen substitution in the aromatic framework of the interstellar particles.
Kaufman James H.
Metin S.
Saperstein D. D.
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