Copper-embedded reduced graphene oxide fibers for multi-sensors

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 fab...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2017, Vol.5 (48), p.12825-12832
Main Authors: Yeo, Chang Su, Kim, Hyunjin, Lim, Taekyung, Kim, Hyuk Joon, Cho, Sanghun, Cho, Kang Rae, Kim, Youn Sang, Shin, Min Kyoon, Yoo, Jeeyoung, Ju, Sanghyun, Park, Sang Yoon
Format: Article
Language:English
Subjects:
Chemical synthesis
Copper
Ethylene glycol
Fibers
Graphene
Spinning (materials)
Temperature sensors
Wearable technology
Wet spinning
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Summary: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 CuCl 2 -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. A copper-embedded reduced graphene oxide (CRGO) fiber-based sensor exhibited chemical sensitive/temperature insensitive or chemical insensitive/temperature sensitive characteristics, depending on the Cu concentration in the CRGO.
ISSN:2050-7526
2050-7534
DOI:10.1039/c7tc03637j