Copper-embedded reduced graphene oxide fibers for multi-sensors. Issue 48 (5th December 2017)

• Record Type: Journal Article
• 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
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 48(2017)
• Page Start: 12825
• Page End: 12832
• Publication Date: 2017-12-05
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc03637j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : 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. Abstract : 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.