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Mussel‐Inspired Defect Engineering of Graphene Liquid Crystalline Fibers for Synergistic Enhancement of Mechanical Strength and Electrical Conductivity
Author(s) -
Kim In Ho,
Yun Taeyeong,
Kim JaeEun,
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
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201803267
Subject(s) - graphene , materials science , composite material , nanotechnology , oxide , fiber , graphene oxide paper , metallurgy
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.