Clustering of aromatic rings in near-frictionless hydrogenated amorphous carbon films probed using multiwavelength Raman spectroscopy

被引：42

作者：

Arenal, R.

Liu, A. C. Y.

机构：

[1] Off Natl Etud & Rech Aerosp, CNRS, Lab Etud Microstruct, F-92322 Chatillon, France

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 21期

关键词：

D O I：

10.1063/1.2805189

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiwavelength Raman spectroscopy has been used to study the structure of hydrogenated amorphous carbon films synthesized by plasma-enhanced chemical vapor deposition. The analysis of different parameters from the Raman spectra demonstrates that the diameter, structural, and topological orders of the sp(2)-bonded ring clusters increase with increasing fractions of hydrogen in the source gas. We report the existence of an unusual peak at 867 cm(-1) that in such extended clusters of aromatic rings, could correspond to a graphitic mode activated by a relaxation of the phonon selection-rule resulting from defects. (C) 2007 American Institute of Physics.

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页数：3

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