Probing structure and strain transfer in dry-spun carbon nanotube fibers by depth-profiled Raman spectroscopy
Date of Issue2013
School of Mechanical and Aerospace Engineering
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.
Applied Physics Letters
© 2013 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: http://dx.doi.org/10.1063/1.4815926. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.