Synthesis of chemically controllable and electrically tunable graphene films by simultaneously fluorinating and reducing graphene oxide |
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| Affiliation: | 1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. University of Chinese Academy of Sciences, Beijing 100080, PR China;1. Department of Physics and Technology, University of Bergen, P.O. Box 7803, NO-5020, Bergen, Norway;2. Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain;3. Instituto “Nicolás Cabrera” and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China;2. University of Chinese Academy of Sciences, Beijing, 100080, P. R. China;1. Department of Mechanical Engineering, University of California, Merced, CA, 95343, United States;2. Environmental Systems Graduate Program, University of California, Merced, CA, 94343, United States;3. Department of Chemical Engineering, College of Engineering, University of the Philippines Diliman, Quezon City, 1101, Philippines;1. Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, PR China;2. State Key Laboratory of Tribology Tsinghua University, Beijing, 100000, PR China;3. National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang, 471023, PR China;4. School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi''an, Shaanxi, 710021, PR China;5. Institute of Advanced Manufacturing and Modern Equipment Technology, School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, PR China;1. Graduate Institute of Energy Engineering, National Central University, Tao-Yuan, 32001, Taiwan;2. Department of Mechanical Engineering, National Central University, Tao-Yuan, 32001, Taiwan;3. Institute of Materials Science and Engineering, National Central University, Tao-Yuan, 32001, Taiwan;4. Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA |
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| Abstract: | Fluorine and oxygen co-doped graphene with controllable element coverage was effectively synthesized through simultaneously fluorinating and reducing graphene oxide by pyrolysis of fluorinated graphite. Morphology investigation indicates that the doped graphene is of few-layered thickness, and the prepared films exhibit layered structure through cross-section. Chemical composition analysis confirms that fluorine has been grafted onto graphene scaffold through C F covalent bond, and the doping level can be readily manipulated just by adjusting the reaction temperature. The structural changes of graphene induced by the controllable doping thus facilitate the tunable electrical property, which can be tuned over several orders of magnitude. These results indicate our method is not only potentially useful to tailor the chemical surface and electronic structure of graphene, but also can find applications in novel electronic devices based on graphene co-doped with different dopants. |
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