title: Shape-engineerable composite fibers and their supercapacitor application.
abstract: Due to excellent electrical and mechanical properties of carbon nano materials, it is of great interest to fabricate flexible, high conductive, and shape engineered carbon based fibers. As part of these approaches, hollow, twist, ribbon, and other various shapes of carbon based fibers have been researched for various functionality and application. In this paper, we suggest simple and effective method to control the fiber shape. We fabricate the three different shapes of hollow, twisted, and ribbon shaped fibers from wet spun giant graphene oxide (GGO)/single walled-nanotubes (SWNTs)/poly(vinyl alcohol) (PVA) gels. Each shaped fibers exhibit different mechanical properties. The average specific strengthes of the hollow, twist, and ribbon fibers presented here are 126.5, 106.9, and 38.0 MPa while strain are 9.3, 13.5, and 5%, respectively. Especially, the ribbon fiber shows high electrical conductivity (524 ± 64 S cm(-1)) and areal capacitance (2.38 mF cm(-2)).
authors.affiliation: Center for Self-powered Actuation and Department of Biomedical Engineering, Hanyang University, Seoul 04763, South Korea. sjk@hanyang.ac.kr.
authors.forename: Kang Min
authors.initials: KM
authors.lastname: Kim
authors.affiliation: Center for Self-powered Actuation and Department of Biomedical Engineering, Hanyang University, Seoul 04763, South Korea. sjk@hanyang.ac.kr and The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX. 75083, USA.
authors.forename: Jae Ah
authors.initials: JA
authors.lastname: Lee
authors.affiliation: Center for Self-powered Actuation and Department of Biomedical Engineering, Hanyang University, Seoul 04763, South Korea. sjk@hanyang.ac.kr.
authors.forename: Hyeon Jun
authors.initials: HJ
authors.lastname: Sim
authors.affiliation: Dept. of Biomedical Engineering, School of Medicine, Chungbuk National University, Cheongju 28644, Korea. kimka@chungbuk.ac.kr.
authors.forename: Kyung-Ah
authors.initials: KA
authors.lastname: Kim
authors.affiliation: Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.
authors.forename: Rouhollah
authors.initials: R
authors.lastname: Jalili
authors.affiliation: Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia.
authors.forename: Geoffrey M
authors.initials: GM
authors.lastname: Spinks
authors.affiliation: Center for Self-powered Actuation and Department of Biomedical Engineering, Hanyang University, Seoul 04763, South Korea. sjk@hanyang.ac.kr.
authors.forename: Seon Jeong
authors.initials: SJ
authors.lastname: Kim