期刊
JOURNAL OF RAMAN SPECTROSCOPY
卷 43, 期 9, 页码 1221-1226出版社
WILEY-BLACKWELL
DOI: 10.1002/jrs.4044
关键词
carbon nanotube fiber; surface twisting angle; polarized Raman; alignment; depth profile
类别
资金
- Singapore DSTA/DIRP Research Grant [POD0814218]
Polarization behaviors of carbon nanotube (CNT) fibers with different twisting were reported. Scanning electron microscope and polarized Raman spectroscopy were used to investigate the prepared samples. Results indicate that surface twisting angle affects greatly the polarization angle and I-///I-perpendicular to ratio of twisted CNT fibers. Raman depth profile measurements imply that the twisted fibers consist of non-uniform CNT alignments. A simplified two-CNT-alignment geometric model was proposed to illuminate the experimental observations. The results suggest that polarized Raman depth profile measurement would be a very useful approach for determining the distribution of CNT alignments in CNT fibers. Copyright (C) 2012 John Wiley & Sons, Ltd.
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