Kim, In Ho Yun, Taeyeong Kim, Jae-Eun Yu, Hayoung Sasikala, Suchithra Padmajan Lee, Kyung Eun Koo, Sung Hwan Hwang, Hoseong Jung, Hong Ju Park, Jeong Young Jeong, Hyeon Su Kim, Sang Ouk 2024-01-19T21:33:14Z 2024-01-19T21:33:14Z 2021-09-04 2018-10 0935-9648 https://pubs.kist.re.kr/handle/201004/120807 Inspired by mussel adhesive polydopamine (PDA), effective reinforcement of graphene-based liquid crystalline fibers to attain high mechanical and electrical properties simultaneously is presented. The two-step defect engineering, relying on bioinspired surface polymerization and subsequent solution infiltration of PDA, addresses the intrinsic limitation of graphene fibers arising from the folding and wrinkling of graphene layers during the fiber-spinning process. For a clear understanding of the mechanism of PDA-induced defect engineering, interfacial adhesion between graphene oxide sheets is straightforwardly analyzed by the atomic force microscopy pull-off test. Subsequently, PDA could be converted into an N-doped graphitic layer within the fiber structure by a mild thermal treatment such that mechanically strong fibers could be obtained without sacrificing electrical conductivity. Bioinspired graphene-based fiber holds great promise for a wide range of applications, including flexible electronics, multifunctional textiles, and wearable sensors. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Mussel-Inspired Defect Engineering of Graphene Liquid Crystalline Fibers for Synergistic Enhancement of Mechanical Strength and Electrical Conductivity Article 10.1002/adma.201803267 1 Advanced Materials, v.30, no.40 Advanced Materials 30 40 N scie scopus 000446056700015 2-s2.0-85052643208 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article ATOMIC-FORCE MICROSCOPY CARBON NANOTUBE FIBERS FUNCTIONALIZED GRAPHENE OXIDE ADHESION POLYDOPAMINE DISPERSIONS NANOSHEETS POLYMER YARNS electrical conductivity graphene fibers graphene oxide mechanical strength polydopamine