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Issue 48, 2017
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Copper-embedded reduced graphene oxide fibers for multi-sensors

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Highly flexible and stretchable graphene-based fibers are one of the most synthetically challenging materials that are suitable for next-generation wearable electronics. Graphene-based fibers used in reliable wearable devices should be multifunctional and stable. Here, we report an easy-handling fabrication method for reduced graphene oxide fibers containing semiconducting CuI and metallic Cu particles (CRGO fiber). The fibers were prepared by wet spinning and hydriodic acid treatment from a CuCl2–ethylene glycol coagulating solution without pre-synthesized CuI and Cu particles. The fabricated CRGO fibers exhibited chemical sensitive/temperature insensitive or chemical insensitive/temperature sensitive characteristics, depending on the Cu concentration in the CRGO. This is the first demonstration of a highly selective chemical and temperature sensor with sensitivity-switching properties fabricated from twisted CRGO fibers comprising two fiber bundles with low and high Cu concentrations.

Graphical abstract: Copper-embedded reduced graphene oxide fibers for multi-sensors

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The article was received on 11 Aug 2017, accepted on 20 Nov 2017 and first published on 05 Dec 2017

Article type: Paper
DOI: 10.1039/C7TC03637J
Citation: J. Mater. Chem. C, 2017,5, 12825-12832
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    Copper-embedded reduced graphene oxide fibers for multi-sensors

    C. S. Yeo, H. Kim, T. Lim, H. J. Kim, S. Cho, K. R. Cho, Y. S. Kim, M. K. Shin, J. Yoo, S. Ju and S. Y. Park, J. Mater. Chem. C, 2017, 5, 12825
    DOI: 10.1039/C7TC03637J

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