Oxygen-promoted synthesis of armchair graphene nanoribbons on Cu(111)  

作　　者：Penghui Ji Oliver MacLean Gianluca Galeotti Dominik Dettmann Giulia Berti Kewei Sun Haiming Zhang Federico Rosei Lifeng Chi 

机构地区：[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

出　　处：《Science China Chemistry》2021年第4期636-641,共6页中国科学（化学英文版）

基　　金：supported by the Ministry of Science and Technology(2017YFA0205002);the National Natural Science Foundation of China(21790053,51821002);the Collaborative Innovation Center of Suzhou Nano Science&Technology。

摘　　要：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.

关 键 词：on-surface synthesis graphene nanoribbons C–H activation scanning tunneling microscopy X-ray photoelectron spectroscopy 

分 类 号：TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]