• 文献标题:   Janus Graphene Liquid Crystalline Fiber with Tunable Properties Enabled by Ultrafast Flash Reduction
  • 文献类型:   Article
  • 作  者:   KIM IH, IM TH, LEE HE, JANG JS, WANG HS, LEE GY, KIM ID, LEE KJ, KIM SO
  • 作者关键词:   fiber, flash light, graphene oxide, humidity sensor, photothermal reduction
  • 出版物名称:   SMALL
  • ISSN:   1613-6810 EI 1613-6829
  • 通讯作者地址:   Korea Adv Inst Sci Technol
  • 被引频次:   6
  • DOI:   10.1002/smll.201901529 EA JUL 2019
  • 出版年:   2019

▎ 摘  要

Flash photothermal treatment via Xenon lamp with a broad wavelength spectrum can effectively remove oxygen functionalities and restore sp(2) domains at graphitic carbon materials. The chemical composition and relevant structure formation of flash reduced graphene oxide liquid crystal (GOLC) fibers are investigated in accordance with flash irradiation conditions. Owing to the spatial controllability of reduction level via anisotropic flash irradiation, the mechanical properties and electrical conductivity of graphene fibers can be delicately counterbalanced to attain desired properties. High sensitivity humidity sensors can be fabricated from the flash reduced fibers demonstrating notably higher sensitivity over the thermally reduced counterparts. This ultrafast flash reduction holds great promise for multidimensional macroscopic GO based structures, enabling a wide range of potential applications, including textile electronics and wearable sensors.