NBN-doped nanographene embedded with five-and seven-membered rings on Au(111)surface  

作　　者：Huan Yang Yun Cao Yixuan Gao Yubin Fu Li Huang Junzhi Liu Xinliang Feng Shixuan Du d Hong-Jun Gao 杨欢;曹云;高艺璇;付钰彬;黄立;刘俊治;冯新亮;杜世萱;高鸿钧(Institute of Physics and University of Chinese Academy of Sciences,Beijing 100190,China;Center for Advancing Electronics Dresden(cfaed)&Faculty of Chemistry and Food Chemistry,Technische Universität Dresden,01062 Dresden,Germany;Department of Chemistry and State Key Laboratory of Synthetic Chemistry,The University of Hong Kong,Hong Kong,China;CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]Institute of Physics and University of Chinese Academy of Sciences,Beijing 100190,China [2]Center for Advancing Electronics Dresden(cfaed)&Faculty of Chemistry and Food Chemistry,Technische Universität Dresden,01062 Dresden,Germany [3]Department of Chemistry and State Key Laboratory of Synthetic Chemistry,The University of Hong Kong,Hong Kong,China [4]CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics B》2021年第5期165-169,共5页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.51761135130 and 61888102);the National Key R&D Program of China(Grant Nos.2018YFA0305800 and 2019YFA0308500);DFG EnhanceNano(Grant No.391979941);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB30000000);the International Partnership Program of Chinese Academy of Sciences(Grant NO.112111KYSB20160061);the K.C.Wong Education Foundation.Part of the research was performed in the Key Laboratory of Vacuum Physics,Chinese Academy of Sciences.Computational resources were provided by the National Supercomputing Center in Tianjin Municipality,China.

摘　　要：Nanographenes(NGs)can be embedded with predesigned dopants or nonhexagonal rings to tailor the electronic properties and provide ideal platforms to study the unique physical and chemical properties.Here,we report the on-surface synthesis of NBN-doped NG embedded with five-and seven-membered rings(NBN-575-NG)on Au(111)from a oligophenylene precursor preinstalled with a NBN unit and a heptagonal ring.Scanning tunneling microscopy and non-contact atomic force microscopy images elucidate the intramolecular cyclodehydrogenation and the existence of the five-and seven-membered rings.Scanning tunneling spectroscopy spectra reveal that the NBN-575-NG is a semiconductor,which agrees with the density functional theory calculation results on a freestanding NBN-575-NG with the same structure.This work provides a feasible approach for the on-surface synthesis of novel NGs containing non-hexagonal rings.

关 键 词：on-surface synthesis NANOGRAPHENE nonhexagonal rings scanning tunneling microscopy density functional theory 

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]