Kim In Ho, Im Tae Hong, Lee Han Eol, Jang Ji-Soo, Wang Hee Seung, Lee Gil Yong, Kim Il-Doo, Lee Keon Jae, Kim Sang Ouk
National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Small. 2019 Nov;15(48):e1901529. doi: 10.1002/smll.201901529. Epub 2019 Jul 1.
Flash photothermal treatment via Xenon lamp with a broad wavelength spectrum can effectively remove oxygen functionalities and restore sp 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.
通过具有宽光谱的氙灯进行的闪光光热处理可以有效地去除含氧官能团，并在石墨碳材料上恢复sp域。根据闪光照射条件，研究了闪光还原氧化石墨烯液晶（GOLC）纤维的化学成分和相关结构形成。由于通过各向异性闪光照射可实现还原程度的空间可控性，因此可以巧妙地平衡石墨烯纤维的机械性能和电导率，以获得所需的性能。由闪光还原纤维制成的高灵敏度湿度传感器显示出比热还原纤维更高的灵敏度。这种超快闪光还原对于基于宏观氧化石墨烯的多维结构具有巨大的潜力，可实现广泛的潜在应用，包括纺织电子学和可穿戴传感器。
