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- Title
Synthesis of a magnetic π-extended carbon nanosolenoid with Riemann surfaces.
- Authors
Wang, Jinyi; Zhu, Yihan; Zhuang, Guilin; Wu, Yayu; Wang, Shengda; Huang, Pingsen; Sheng, Guan; Chen, Muqing; Yang, Shangfeng; Greber, Thomas; Du, Pingwu
- 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. Fabrication of large π-conjugated carbon nanosolenoid materials with helicoid topology remains a challenge. Here the authors demonstrate synthesis of a metal-free π-extended carbon nanosolenoid material with a helical structure, exhibiting unique photophysical and magnetic properties.
- Subjects
SCANNING transmission electron microscopy; HELICAL structure; MAGNETIC susceptibility; MAGNETIC measurements; MOLECULAR structure; HELICES (Algebraic topology)
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-28870-z