Long-range ordered and atomic-scale control of graphene hybridization by photocycloaddition

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Miao Yu, Harbin Institute of Technology
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  • Chong Chen, Harbin Institute of Technology
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  • Qi Liu, China Academy of Engineering Physics
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  • Cristina Mattioli, Centre d'Elaboration de Matériaux et d'Etudes Structurales
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  • Hongqian Sang, King's College London, Jianghan University
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  • Guoqiang Shi, Harbin Institute of Technology
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  • Wujun Huang, Xiamen University
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  • Kongchao Shen, Shanghai Advanced Research Institute, Chinese Academy of Sciences
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  • Zhuo Li, Harbin Institute of Technology
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  • Pengcheng Ding, Harbin Institute of Technology
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  • Pengfei Guan, China Academy of Engineering Physics
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  • Shaoshan Wang, Harbin Institute of Technology
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  • Ye Sun, Harbin Institute of Technology
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  • Jinping Hu, Shanghai Advanced Research Institute, Chinese Academy of Sciences
  • ,
  • André Gourdon, Centre d'Elaboration de Matériaux et d'Etudes Structurales
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  • Lev Kantorovich, King's College London
  • ,
  • Flemming Besenbacher
  • Mingshu Chen, Xiamen University
  • ,
  • Fei Song, Shanghai Advanced Research Institute, Chinese Academy of Sciences
  • ,
  • Federico Rosei, Institut National de la Recherche Scientifique

Chemical reactions that convert sp2 to sp3 hybridization have been demonstrated to be a fascinating yet challenging route to functionalize graphene. So far it has not been possible to precisely control the reaction sites nor their lateral order at the atomic/molecular scale. The application prospects have been limited for reactions that require long soaking, heating, electric pulses or probe-tip press. Here we demonstrate a spatially selective photocycloaddition reaction of a two-dimensional molecular network with defect-free basal plane of single-layer graphene. Directly visualized at the submolecular level, the cycloaddition is triggered by ultraviolet irradiation in ultrahigh vacuum, requiring no aid of the graphene Moiré pattern. The reaction involves both [2+2] and [2+4] cycloadditions, with the reaction sites aligned into a two-dimensional extended and well-ordered array, inducing a bandgap for the reacted graphene layer. This work provides a solid base for designing and engineering graphene-based optoelectronic and microelectronic devices. [Figure not available: see fulltext.].

Original languageEnglish
JournalNature Chemistry
Volume12
Issue11
Pages (from-to)1035-1041
Number of pages7
ISSN1755-4330
DOIs
Publication statusPublished - Nov 2020

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