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測量應(yīng)用案例-20210201
閱讀:117 發(fā)布時間:2021-2-4提 供 商 | 美國布魯克海文儀器公司 | 資料大小 | 2MB |
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作者: Zejun Zhang; Jinli Qin; Huailing Diao; Shasha Huang; Jin Yin; Hui Zhang; Yongxin Duan; Jianming Zhang
Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key, Qingdao University of Science & Technology, Qingdao City, 266042, People’s Republic of China
摘要:Janus graphene oxide (GO) usually refers to a unique two-dimensional material with asymmetric surface chemistries on opposite faces of the sheets. Herein, we propose a facile and efficient method to fabricate Janus-like GO (JGO) with a novel asymmetric structure along the faces of the sheets. Unlike the traditional post-synthesis of double-faced Janus GO based on pre-prepared GO, the novel JGO with a randomly distributed asymmetric oxidation structure along the sheet face can be achieved by a simple ultrasonic treatment on partially oxidized graphene. The asymmetric oxidation structure along the sheet face of our Janus GO was confirmed by confocal micro-Raman imaging and analysis of height profiles by atomic force microscopy. Due to the asymmetric oxidation structure, the as-prepared JGO has amphiphilic characteristics, with hydrophilicity on one side of the sheet and hydrophobicity on the other side, leading to an eyelash-like liquid crystal alignment at the oil/water interface. The perpendicular alignment rather than the parallel orientation behavior of GO liquid crystals at the oil/water interface further confirms the asymmetric structure of our JGO along the face graphene sheets. The simple approach and a new class of JGO proposed herein provide a new insight into understanding the asymmetric chemistry of graphene.