中国物理B ›› 2021, Vol. 30 ›› Issue (5): 56802-056802.doi: 10.1088/1674-1056/abeede

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

Huan Yang(杨欢)1, Yun Cao(曹云)1, Yixuan Gao(高艺璇)1, Yubin Fu(付钰彬)2, Li Huang(黄立)1,†, Junzhi Liu(刘俊治)2,3, Xinliang Feng(冯新亮)2,‡, Shixuan Du(杜世萱)1,4,§, and Hong-Jun Gao(高鸿钧)1,4   

  1. 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
  • 收稿日期:2021-03-01 修回日期:2021-03-13 接受日期:2021-03-16 出版日期:2021-05-14 发布日期:2021-05-14
  • 通讯作者: Li Huang, Xinliang Feng, Shixuan Du E-mail:lhuang@iphy.ac.cn;xinliang.feng@tu-dresden.de;sxdu@iphy.ac.cn
  • 基金资助:
    Project supported by 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), and 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.

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

Huan Yang(杨欢)1, Yun Cao(曹云)1, Yixuan Gao(高艺璇)1, Yubin Fu(付钰彬)2, Li Huang(黄立)1,†, Junzhi Liu(刘俊治)2,3, Xinliang Feng(冯新亮)2,‡, Shixuan Du(杜世萱)1,4,§, and Hong-Jun Gao(高鸿钧)1,4   

  1. 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
  • Received:2021-03-01 Revised:2021-03-13 Accepted:2021-03-16 Online:2021-05-14 Published:2021-05-14
  • Contact: Li Huang, Xinliang Feng, Shixuan Du E-mail:lhuang@iphy.ac.cn;xinliang.feng@tu-dresden.de;sxdu@iphy.ac.cn
  • Supported by:
    Project supported by 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), and 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

Abstract: 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.

Key words: on-surface synthesis, nanographene, nonhexagonal rings, scanning tunneling microscopy, density functional theory

中图分类号:  (Electronic structure of graphene)

  • 73.22.Pr
68.37.Ps (Atomic force microscopy (AFM)) 68.37.Ef (Scanning tunneling microscopy (including chemistry induced with STM))