Probing structure and strain transfer in dry-spun carbon nanotube fibers by depth-profiled Raman spectroscopy

Jinyuan Zhou, Gengzhi Sun, Zhaoyao Zhan, Jianing An, Lianxi Zheng, Erqing Xie

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The structural properties of dry-spun carbon nanotube (CNT) fibers were characterized by depth-profiled polarized Raman spectroscopy. Results showed that the twisting cannot be fully transferred through the whole fiber and the CNTs within fibers possess non-uniform alignments in radial direction. Effective twisting depth was determined from the residue strain distribution within fibers. Larger surface twisting angles can result in higher residue strain, better alignment degree, and deeper twisting depth. This research suggests a balance should be built between the enhancement of CNT interactions and the increase of defect density to obtain high-performance fibers.

Original languageEnglish
Article number031912
JournalApplied Physics Letters
Volume103
Issue number3
DOIs
StatePublished - 15 Jul 2013
Externally publishedYes

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