Synthesis of a magnetic π-extended carbon nanosolenoid with Riemann surfaces

Jinyi Wang, Yihan Zhu, Guilin Zhuang, Yayu Wu, Shengda Wang, Pingsen Huang, Guan Sheng, Muqing Chen, Shangfeng Yang, Thomas Greber and Pingwu Du ()
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Jinyi Wang: University of Science and Technology of China
Yihan Zhu: Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology
Guilin Zhuang: Zhejiang University of Technology
Yayu Wu: University of Science and Technology of China
Shengda Wang: University of Science and Technology of China
Pingsen Huang: University of Science and Technology of China
Guan Sheng: Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology
Muqing Chen: University of Science and Technology of China
Shangfeng Yang: University of Science and Technology of China
Thomas Greber: University of Zürich
Pingwu Du: University of Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Riemann surfaces are deformed versions of the complex plane in mathematics. Locally they look like patches of the complex plane, but globally, the topology may deviate from a plane. Nanostructured graphitic carbon materials resembling a Riemann surface with helicoid topology are predicted to have interesting electronic and photonic properties. However, fabrication of such processable and large π-extended nanographene systems has remained a major challenge. Here, we report a bottom-up synthesis of a metal-free carbon nanosolenoid (CNS) material with a low optical bandgap of 1.97 eV. The synthesis procedure is rapid and possible on the gram scale. The helical molecular structure of CNS can be observed by direct low-dose high-resolution imaging, using integrated differential phase contrast scanning transmission electron microscopy. Magnetic susceptibility measurements show paramagnetism with a high spin density for CNS. Such a π-conjugated CNS allows for the detailed study of its physical properties and may form the base of the development of electronic and spintronic devices containing CNS species.

Date: 2022
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DOI: 10.1038/s41467-022-28870-z

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