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

Barnett, Chris J.; McGettrick, James D.; Gangoli, Varun Shenoy; Kazimierska, Ewa; White, Alvin Orbaek; Barron, Andrew; Barnett, Christopher; McGettrick, James; Gangoli, Varun; Kazimierska, Ewa

doi:10.3390/ma14092106

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

Chris J. Barnett

, James D. McGettrick, Varun Shenoy Gangoli, Ewa Kazimierska, Alvin Orbaek White

, Andrew Barron, Christopher Barnett, James McGettrick

, Varun Gangoli

, Ewa Kazimierska

Materials, Volume: 14, Issue: 9, Start page: 2106

Swansea University Authors: Alvin Orbaek White , Andrew Barron, Christopher Barnett, James McGettrick , Varun Gangoli , Ewa Kazimierska

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DOI (Published version): 10.3390/ma14092106

Abstract

Carbon 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 fi...

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Published in:	Materials
ISSN:	1996-1944
Published:	MDPI AG 2021
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa56930

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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.</abstract><type>Journal Article</type><journal>Materials</journal><volume>14</volume><journalNumber>9</journalNumber><paginationStart>2106</paginationStart><paginationEnd/><publisher>MDPI AG</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic>1996-1944</issnElectronic><keywords>carbon nanotubes; fiber; pressure; XPS; conduction</keywords><publishedDay>21</publishedDay><publishedMonth>4</publishedMonth><publishedYear>2021</publishedYear><publishedDate>2021-04-21</publishedDate><doi>10.3390/ma14092106</doi><url>http://dx.doi.org/10.3390/ma14092106</url><notes>The data presented in this study are available on request from the corresponding author.</notes><college>COLLEGE NANME</college><department>Engineering and Applied Sciences School</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>EAAS</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>This research was funded by the Office of Naval Research (N00014-2717), the Welsh Government Sêr Cymru National Research Network in Advanced Engineering and Materials (NRN-150), and the EPSRC (EP/N020863/1). 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spelling	2022-07-07T13:58:36.4615214 v2 56930 2021-05-20 Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers 8414a23650d4403fdfe1a735dbd2e24e 0000-0001-6338-5970 Alvin Orbaek White Alvin Orbaek White true false 92e452f20936d688d36f91c78574241d Andrew Barron Andrew Barron true false 3cc4b7c0dcf59d3ff31f9f13b0e5a831 Christopher Barnett Christopher Barnett true false bdbacc591e2de05180e0fd3cc13fa480 0000-0002-7719-2958 James McGettrick James McGettrick true false 677b4758fd9d95755d516b096be7d396 0000-0001-5313-5839 Varun Gangoli Varun Gangoli true false acd104d55246ee2d03420795510359e9 Ewa Kazimierska Ewa Kazimierska true false 2021-05-20 EAAS Carbon 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. Journal Article Materials 14 9 2106 MDPI AG 1996-1944 carbon nanotubes; fiber; pressure; XPS; conduction 21 4 2021 2021-04-21 10.3390/ma14092106 http://dx.doi.org/10.3390/ma14092106 The data presented in this study are available on request from the corresponding author. COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University This research was funded by the Office of Naval Research (N00014-2717), the Welsh Government Sêr Cymru National Research Network in Advanced Engineering and Materials (NRN-150), and the EPSRC (EP/N020863/1). The authors thank Swansea University AIM Facility via EPSRC (EP/M028267/1) and the Welsh European Funding Office (Project 80708) for funding the XPS facility. 2022-07-07T13:58:36.4615214 2021-05-20T09:46:32.8000057 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Chris J. Barnett 0000-0002-0139-836x 1 James D. McGettrick 2 Varun Shenoy Gangoli 3 Ewa Kazimierska 4 Alvin Orbaek White 0000-0001-6338-5970 5 Andrew Barron 6 Christopher Barnett 7 James McGettrick 0000-0002-7719-2958 8 Varun Gangoli 0000-0001-5313-5839 9 Ewa Kazimierska 10 56930__19949__56a39772832c466495ba9de31e2648e3.pdf 56930.pdf 2021-05-20T09:48:03.0693597 Output 3642071 application/pdf Version of Record true © 2021 by the authors. This is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true eng http://creativecommons.org/licenses/by/4.0/
title	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
spellingShingle	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers Alvin Orbaek White Andrew Barron Christopher Barnett James McGettrick Varun Gangoli Ewa Kazimierska
title_short	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
title_full	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
title_fullStr	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
title_full_unstemmed	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
title_sort	Effect of Applied Pressure on the Electrical Resistance of Carbon Nanotube Fibers
author_id_str_mv	8414a23650d4403fdfe1a735dbd2e24e 92e452f20936d688d36f91c78574241d 3cc4b7c0dcf59d3ff31f9f13b0e5a831 bdbacc591e2de05180e0fd3cc13fa480 677b4758fd9d95755d516b096be7d396 acd104d55246ee2d03420795510359e9
author_id_fullname_str_mv	8414a23650d4403fdfe1a735dbd2e24e_*_Alvin Orbaek White 92e452f20936d688d36f91c78574241d__Andrew Barron 3cc4b7c0dcf59d3ff31f9f13b0e5a831__Christopher Barnett bdbacc591e2de05180e0fd3cc13fa480__James McGettrick 677b4758fd9d95755d516b096be7d396__Varun Gangoli acd104d55246ee2d03420795510359e9_*_Ewa Kazimierska
author	Alvin Orbaek White Andrew Barron Christopher Barnett James McGettrick Varun Gangoli Ewa Kazimierska
author2	Chris J. Barnett James D. McGettrick Varun Shenoy Gangoli Ewa Kazimierska Alvin Orbaek White Andrew Barron Christopher Barnett James McGettrick Varun Gangoli Ewa Kazimierska
format	Journal article
container_title	Materials
container_volume	14
container_issue	9
container_start_page	2106
publishDate	2021
institution	Swansea University
issn	1996-1944
doi_str_mv	10.3390/ma14092106
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
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department_str	School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url	http://dx.doi.org/10.3390/ma14092106
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description	Carbon 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.
published_date	2021-04-21T07:58:08Z
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score	11.047306

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

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