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Oxygen-promoted synthesis of armchair graphene nanoribbons on Cu(111) |
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| Authors: | Ji Penghui MacLean Oliver Galeotti Gianluca Dettmann Dominik Berti Giulia Sun Kewei Zhang Haiming Rosei Federico Chi Lifeng |
| Institution: | 1.Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials, Soochow University, Suzhou, 215123, China ;2.Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, QC, Canada ;3.Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China ;4.Deutsches Museum, Museumsinsel 1, 80538, Munich, Germany ;5.Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan ; |
| Abstract: | We report the systematic investigation of the effects of oxygen on the synthesis of 3 p sub-family armchair graphene nanoribbons(3 p-AGNRs), which revealed a strong catalytic effect with a reduction in the reaction temperature by approximately 180 K without degradation of the AGNRs. Poly(para-phenylene)(3-AGNR) was generated through Ullmann-type coupling of4,4'-dibromo-p-terphenyl on Cu(111), which was then converted into wider 3 p-AGNRs via lateral fusion. Scanning tunneling microscopy(STM) and X-ray photoelectron spectroscopy demonstrated the formation of different ribbons up to 12-AGNR,which contained regions exhibiting increased STM contrast that we attribute to the intercalation of Br atoms during lateral fusion. |
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