Early View e202500490
Research Article

Engineering Graphene Nanoribbons via Periodically Embedding Oxygen Atoms

Dr. Yan Zhao

Dr. Yan Zhao

State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198 China

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

Both authors contributed equally to this work.

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Dr. Li-Xia Kang

Dr. Li-Xia Kang

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

Both authors contributed equally to this work.

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Yi-Jun Wang

Yi-Jun Wang

State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198 China

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Yi Wu

Yi Wu

State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198 China

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Guang-Yan Xing

Guang-Yan Xing

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

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Dr. Shi-Wen Li

Dr. Shi-Wen Li

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

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Dr. Jinliang Pan

Dr. Jinliang Pan

CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing, 100190 China

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Nie-Wei Wang

Nie-Wei Wang

College of Physics Science and Technology, Hebei University, Baoding, 071002 China

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Dr. Yin-Ti Ren

Dr. Yin-Ti Ren

College of Physics Science and Technology, Hebei University, Baoding, 071002 China

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Ying Wang

Ying Wang

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

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Dr. Ya-Cheng Zhu

Dr. Ya-Cheng Zhu

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

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Prof. Xing-Qiang Shi

Corresponding Author

Prof. Xing-Qiang Shi

College of Physics Science and Technology, Hebei University, Baoding, 071002 China

E-mail: [email protected]; [email protected]; [email protected], [email protected], [email protected]

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Dr. Mengxi Liu

Corresponding Author

Dr. Mengxi Liu

CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

E-mail: [email protected]; [email protected]; [email protected], [email protected], [email protected]

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Prof. Xiaohui Qiu

Corresponding Author

Prof. Xiaohui Qiu

CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

E-mail: [email protected]; [email protected]; [email protected], [email protected], [email protected]

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Prof. Pei-Nian Liu

Corresponding Author

Prof. Pei-Nian Liu

State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198 China

School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237 China

E-mail: [email protected]; [email protected]; [email protected], [email protected], [email protected]

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Prof. Deng-Yuan Li

Corresponding Author

Prof. Deng-Yuan Li

State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing, 211198 China

E-mail: [email protected]; [email protected]; [email protected], [email protected], [email protected]

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First published: 26 June 2025

Graphical Abstract

Two types of oxygen-doped graphene nanoribbons (O-doped chevron-GNR and O-doped chiral (2,1)-GNR) were synthesized on Au(111) via in situ formation of pyrans. Both O-doped GNRs are direct bandgap semiconductors but exhibit different sensitivities to oxygen dopants, which is attributed to the difference in the density of states near the Fermi level between the substituted intrinsic carbon atoms and their pristine counterparts.

Abstract

Heteroatom doping is an important method for engineering graphene nanoribbons (GNRs) because of its ability to modify electronic properties by introducing extra electrons or vacancies. However, precisely integrating oxygen atoms into the lattice of GNRs is unexplored, and the resulting electronic properties remain elusive. Here, we achieve the precise embedding of oxygen atoms into the lattice of GNRs via in situ formation of pyrans, synthesizing two types of oxygen-doped GNRs (O-doped chevron-GNR and O-doped chiral (2,1)-GNR). Using scanning tunneling microscopy, noncontact atomic force microscopy, and density functional theory calculations, the atomic structures and electronic properties of O-doped GNRs are determined, demonstrating that both GNRs are direct bandgap semiconductors with different sensitivities to oxygen dopants. Oxygen dopants have a minor impact on the bandgap of chevron-GNR but a significant effect on the bandgap of chiral (2,1)-GNR, which is attributed to the difference in density of states near the Fermi level between substituted intrinsic carbon atoms and their pristine counterparts. Compared with the pristine chiral (2,1)-GNR, the band structure of O-doped chiral (2,1)-GNR exhibits unexpected band edges transition, which is ascribed to sp2-hybridized oxygen atoms which introduces additional electrons to the conduction band of chiral (2,1)-GNR, leading to the upward shift of Fermi surface.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.