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Deuteron Magnetic Resonance and Infrared Absorption Studies of Structure and Dynamics in Amorphous Hydrogenated Carbon and Carbon Nitride

Published online by Cambridge University Press:  22 February 2011

Shu-Han Lin ,
Bernard J. Feldman ,
J. R. Bodart ,
V. P. Bork ,
M. J. Kernan ,
P. A. Fedders  and
R. E. Norberg
Shu-Han Lin
Affiliation:
Department of Physics and Center for Molecular Electronics, University of Missouri, St. Louis, MO 63121
Bernard J. Feldman
Affiliation:
Department of Physics and Center for Molecular Electronics, University of Missouri, St. Louis, MO 63121
J. R. Bodart
Affiliation:
Department of Physics, Washington University, St. Louis, MO 63130
V. P. Bork
Affiliation:
Department of Physics, Washington University, St. Louis, MO 63130
M. J. Kernan
Affiliation:
Department of Physics, Washington University, St. Louis, MO 63130
P. A. Fedders
Affiliation:
Department of Physics, Washington University, St. Louis, MO 63130
R. E. Norberg
Affiliation:
Department of Physics, Washington University, St. Louis, MO 63130
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Abstract

Deuteron magnetic resonance (DMR) and infrared absorption spectra have been measured in amorphous hydrogenated carbon (a-C:H and a-C:D,H) and amorphous hydrogenated carbon nitride (a-CN:D,H) films plasma-deposited onto room-temperature substrates from feedstock mixtures of CH4, N2, and D2. DMR spectra and transient magnetization recoveries were measured between room temperature and 4 K. Recoveries are dominated by magnetization transport under extreme inhomogeneity. Methyl rotors CDx H3-x freeze out below 77 K. From the infrared absorption spectra, NH2, CHx, double bonded C-C, and triple bonded C-N stretching modes are observed. As a function of increasing nitrogen concentrations, the NH2 and C-N intensities dramatically increase while the CHx and C-C intensities decrease. In films where the ratio of nitrogen to carbon plus nitrogen is greater than 25%, the absorption spectra are dominated by NH2 stretching and bending modes; in contrast, the DMR spectra show many CDxHy configurations and a broader NDxHy structure. Proton NMR shows significant hydrogen clustering in a-CN:D,H.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 349: Symposium T – Novel Forms of Carbon II , 1994 , 489
Copyright
Copyright © Materials Research Society 1994

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References

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