Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers

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dc.citation.articleNumber2106en_US
dc.citation.issueNumber9en_US
dc.citation.journalTitleMaterialsen_US
dc.citation.volumeNumber14en_US
dc.contributor.authorBarnett, Chris J.en_US
dc.contributor.authorMcGettrick, James D.en_US
dc.contributor.authorGangoli, Varun Shenoyen_US
dc.contributor.authorKazimierska, Ewaen_US
dc.contributor.authorOrbaek White, Alvinen_US
dc.contributor.authorBarron, Andrew R.en_US
dc.date.accessioned2021-06-07T20:22:42Zen_US
dc.date.available2021-06-07T20:22:42Zen_US
dc.date.issued2021en_US
dc.description.abstractCarbon nanotubes (CNTs) can be spun into fibers as potential lightweight replacements for copper in electrical current transmission since lightweight CNT fibers weigh <1/6th that of an equivalently dimensioned copper wire. Experimentally, it has been shown that the electrical resistance of CNT fibers increases with longitudinal strain; however, although fibers may be under radial strain when they are compressed during crimping at contacts for use in electrical current transport, there has been no study of this relationship. Herein, we apply radial stress at the contact to a CNT fiber on both the nano- and macro-scale and measure the changes in fiber and contact resistance. We observed an increase in resistance with increasing pressure on the nanoscale as well as initially on the macro scale, which we attribute to the decreasing of axial CNT…CNT contacts. On the macro scale, the resistance then decreases with increased pressure, which we attribute to improved radial contact due to the closing of voids within the fiber bundle. X-ray photoelectron spectroscopy (XPS) and UV photoelectron spectroscopy (UPS) show that applied pressure on the fiber can damage the π–π bonding, which could also contribute to the increased resistance. As such, care must be taken when applying radial strain on CNT fibers in applications, including crimping for electrical contacts, lest they operate in an unfavorable regime with worse electrical performance.en_US
dc.identifier.citationBarnett, Chris J., McGettrick, James D., Gangoli, Varun Shenoy, et al.. "Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers." <i>Materials,</i> 14, no. 9 (2021) MDPI: https://doi.org/10.3390/ma14092106.en_US
dc.identifier.digitalmaterials-14-02106-v3en_US
dc.identifier.doihttps://doi.org/10.3390/ma14092106en_US
dc.identifier.urihttps://hdl.handle.net/1911/110692en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citeden_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleEffect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibersen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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