Journal
CHEMICAL PHYSICS LETTERS
Volume 450, Issue 4-6, Pages 375-378Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.11.046
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Vibrational bands associated with the out of plane bending modes of CH groups attached to various aromatic ring structures have been identified in surface enhanced Raman spectra of diamond-like amorphous carbon films deposited by femtosecond laser ablation of graphite. The appearance of enhanced modes associated with specific ring structures is assigned to solo-, duo-, trio- and quartet-CH groups and to pendant rings. Analysis of these bands provides insight into the nature of the molecular ring components of fs-DLC films. The resulting composition consists of polycyclic aromatic carbon (PAH)-like ring molecules and polyyne chains stabilized in a sp(3)-bonded network. (c) 2007 Elsevier B.V. All rights reserved.
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