Volume 132, Issue 7 pp. 2691-2695
Zuschrift

On-surface Synthesis of a Semiconducting 2D Metal–Organic Framework Cu3(C6O6) Exhibiting Dispersive Electronic Bands

Dr. Ran Zhang

Dr. Ran Zhang

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

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Dr. Jing Liu

Dr. Jing Liu

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

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Yifan Gao

Yifan Gao

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Muqing Hua

Muqing Hua

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

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Bowen Xia

Bowen Xia

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Peter Knecht

Peter Knecht

Physics Department E20, Technical University of Munich, 85748 Garching, Germany

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Dr. Anthoula C. Papageorgiou

Dr. Anthoula C. Papageorgiou

Physics Department E20, Technical University of Munich, 85748 Garching, Germany

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Dr. Joachim Reichert

Dr. Joachim Reichert

Physics Department E20, Technical University of Munich, 85748 Garching, Germany

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Prof. Dr. Johannes V. Barth

Prof. Dr. Johannes V. Barth

Physics Department E20, Technical University of Munich, 85748 Garching, Germany

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Prof. Dr. Hu Xu

Prof. Dr. Hu Xu

Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Prof. Dr. Li Huang

Corresponding Author

Prof. Dr. Li Huang

Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

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Prof. Dr. Nian Lin

Corresponding Author

Prof. Dr. Nian Lin

Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China

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First published: 10 December 2019
Citations: 16

Abstract

A 2D metal–organic framework (2D-MOF) was formed on a Cu(111) substrate using benzenehexol molecules. By means of a combination of scanning tunneling microscopy and spectroscopy, X-ray photoelectron spectroscopy and density-functional theory, the structure of the 2D-MOF is determined to be Cu3(C6O6), which is stabilized by O–Cu–O bonding motifs. We find that upon adsorption on Cu(111), the 2D-MOF features a semiconductor band structure with a direct band gap of 1.5 eV. The O–Cu–O bonds offer efficient charge delocalization, which gives rise to a highly dispersive conduction band with an effective mass of 0.45 me at the band bottom, implying a high electron mobility in this material.

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