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Research Article

Construction and nanotribological study of a glassy covalent organic network on surface

Guangyuan Feng1, Qingqing Luo1, Mengqi Li1, Yaru Song1, Yongtao Shen2( ), Shengbin Lei1( ), Wenping Hu1
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
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Graphical Abstract

The large-scale, continuous, and low-defect glassy covalent organic networks (GCONs) was constructed based on dynamic covalent chemistry on surface, and the GCONs have lower friction coefficient in comparison with crystalline covalent organic frameworks (COFs).

Abstract

Unraveling the nature of complex condensed matter systems is of paramount importance in a variety of fields such as pharmacology and materials science. Here we report the synthesis, by the dynamic covalent chemistry (DCC), of a robust, continuous, and low-defect glassy covalent organic network (GCON). The direct imaging of the molecular structure clearly shows the amorphous nature of GCONs, which consists with the competing (nano) crystallite model, not Zachariasen continuous random networks (Z-CRN). Remarkably, the microscopic friction properties were measured on GCONs by atomic force microscopy (AFM), and the GCONs showed lower friction force in comparison with crystalline covalent organic frameworks (COFs).

Keywords

atomic force microscopyglassy covalent organic networks (GCON)nanotribologicalcompeting (nano) crystallite modelscanning tunneling microscopy

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Nano Research
Volume 15 Issue 5,
May 2022
Pages 4682-4686
DOI: 10.1007/s12274-021-3988-5
Cite this article:
Feng G, Luo Q, Li M, et al. Construction and nanotribological study of a glassy covalent organic network on surface. Nano Research, 2022, 15(5): 4682-4686. https://doi.org/10.1007/s12274-021-3988-5
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Received: 11 September 2021
Revised: 21 October 2021
Accepted: 09 November 2021
Published: 15 December 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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