Stretchable and highly conductive carbon nanotube-graphene hybrid yarns for wearable systems

Syed Muzahir Abbas, Javad Foroughi, Yogeshwar Ranga, Ladislau Matekovits, Karu P. Esselle, Stuart G. Hay, Michael Heimlich, Farzad Safaei

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Abstract

Carbon Nanotubes (CNTs) have emerged as potential candidates for replacement of conventional metals due to their significant mechanical, electrical, thermal properties and non-oxidizing abilities [1, 2]. The density of CNT composites is about five times lower than copper and around half that of aluminium. Moreover, their thermal conductivity is about ten times that of copper. With the above mentioned distinguishing features, CNTs have been of interest in medical, electronics and antenna applications [3]. CNTs are drawn into yarns by pulling and twisting them from CNT forests. Previously we have presented microwave characterization of CNT yarns [4]. Our results have shown that the CNT yarns exhibits frequency independent resistive behavior and is beneficial for wide-band applications such as ultra-wideband (UWB) and wireless body area networks [4]. Electrical conductivity of a CNT yarn depends on the properties, loading and aspect ratio of the CNTs. It also depends upon the twist angle and the characteristics of the conductive network. By doping or adding materials, such as gold, silver or NiCr, electrical conductivity of CNTs can by varied. In [5], highly conductive carbon nanotube-graphene hybrid yarns are reported. They are obtained by drawing vertically aligned multi-walled carbon nanotubes (MWCNT) into long MWCNT sheets.
Original languageEnglish
Title of host publicationBodyNets 2015
Subtitle of host publicationProceedings of the 10th EAI International Conference on Body Area Networks
Place of PublicationNew York, NY
PublisherAssociation for Computing Machinery
Pages308-309
Number of pages2
ISBN (Print)9781631900846
DOIs
Publication statusPublished - 2015
EventInternational Conference on Body Area Networks (10th : 2015) - Sydney
Duration: 28 Sep 201530 Sep 2015

Conference

ConferenceInternational Conference on Body Area Networks (10th : 2015)
CitySydney
Period28/09/1530/09/15

Keywords

  • carbon nanotube
  • graphene
  • carbon nanotube-graphene
  • yarns
  • hybrid yarns
  • stretchable yarns
  • highly conductive yarns
  • wearable

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