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Research Article

On-surface synthesis and edge states of NBN-doped zigzag graphene nanoribbons

Xiao Chang1,2,§Li Huang1,2,§Yixuan Gao1,2,§Yubin Fu3,4,§Ji Ma3,4Huan Yang1,2Junzhi Liu5Xiaoshuai Fu1,2Xiao Lin1,2( )Xinliang Feng3,4( )Shixuan Du1,2,6( )Hong-Jun Gao1,2,6( )
University of Chinese Academy of Sciences, Beijing 100190, China
Beijing National Center for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Center for Advancing Electronics Dresden (CfAED) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden D-01069, Germany
Max Planck Institute of Microstructure Physics, Weinberg 2, Halle 06120, Germany
Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong 999077, China
Songshan Lake Materials Laboratory, Dongguan 523808, China

§ Xiao Chang, Li Huang, Yixuan Gao, and Yubin Fu contributed equally to this work.

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Graphical Abstract

We synthesized eight-carbon-zigzag-line wide graphene nanoribbons with nitrogen-boron-nitrogen (NBN) motifs decorated along their zigzag edges (NBN-8-ZGNRs) on Au (111) surface, which starts from a specially designed U-shaped monomer with preinstalled NBN units at the zigzag edge. The electronic states distributed along the zigzag edges have been revealed after a silicon-layer intercalation at the interface of NBN-8-ZGNR and Au (111).

Abstract

Zigzag graphene nanoribbons (ZGNRs) with spin-polarized edge states have potential applications in carbon-based spintronics. The electronic structure of ZGNRs can be effectively tuned by different widths or dopants, which requires delicately designed monomers. Here, we report the successful synthesis of ZGNR with a width of eight carbon zigzag lines and nitrogen-boron-nitrogen (NBN) motifs decorated along the zigzag edges (NBN-8-ZGNR) on Au (111) surface, which starts from a specially designed U-shaped monomer with preinstalled NBN units at the zigzag edge. Chemical-bond-resolved non-contact atomic force microscopy (nc-AFM) imaging confirms the zigzag-terminated edges and the existence of NBN dopants. The electronic states distributed along the zigzag edges have been revealed after a silicon-layer intercalation at the interface of NBN-8-ZGNR and Au (111). Our work enriches the ZGNR family with a new dopant and larger width, which provides more candidates for future carbon-based nanoelectronic and spintronic applications.

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Nano Research
Pages 10436-10442
Cite this article:
Chang X, Huang L, Gao Y, et al. On-surface synthesis and edge states of NBN-doped zigzag graphene nanoribbons. Nano Research, 2023, 16(7): 10436-10442. https://doi.org/10.1007/s12274-023-5605-2
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Received: 24 December 2022
Revised: 13 February 2023
Accepted: 22 February 2023
Published: 26 March 2023
© Tsinghua University Press 2023
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