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Polarization behaviors of twisted carbon nanotube fibers
Author(s) -
Zhou Jinyuan,
Sun Gengzhi,
Zhan Zhaoyao,
An Jianing,
Zhang Yongzhe,
Zhang Yani,
Zheng Lianxi
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4044
Subject(s) - raman spectroscopy , carbon nanotube , materials science , scanning electron microscope , polarization (electrochemistry) , nanotechnology , composite material , optics , molecular physics , chemistry , physics
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 ⊥ 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 © 2012 John Wiley & Sons, Ltd.