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Stretchable graphene conductor based on fluid dynamics and its application to flexible conductometric sensor

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2022, 32(7), pp.1791-1798
  • DOI : 10.1007/s42823-022-00403-0
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : August 3, 2022
  • Accepted : September 5, 2022
  • Published : December 1, 2022

Kil Min Sik 1 Park Hong Jun 1 Yoon Jo Hee 1 Jang Jinwu 1 Lee Kyoung G. 2 Choi Bong Gill 1

1Department of Chemical Engineering, Kangwon National University
2National Nanofab Center, Center for Nano Bio Development

Accredited

ABSTRACT

A facile and efficient method was developed to prepare highly stretchable and conductive graphene conductors with wrinkled structures by the mechanical stretching and shrinking of elastomeric substrates, in which graphene inks were printed on a prestretched elastomeric substrate. Stretchable and exfoliated graphene inks were prepared by mixing graphite and Ecoflex in a shear-assisted fluid dynamics reactor. The resultant graphene conductor exhibited excellent stretchability at 150% strain and high electrical conductivity of 64 ± 1.2 S m−1. The resistance of the conductor did not change in bent, twisted, and stretched states. The resistance did not change during 10,000 cycles of stretching/releasing, with a maximum strain of 150%. Based on the graphene conductor, a stretchable conductometric sensor with a two-electrode configuration was fabricated to measure impedance changes at different concentrations of electrolyte ions. This sensor exhibited a good and linear sensitivity curve (298.61 Ω mM−1, R2 = 0.999) in bent and stretched states.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-07-13)

Total Citation Counts(KCI+WOS) (5) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (3) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

* References for papers published after 2022 are currently being built.

This paper was written with support from the National Research Foundation of Korea.