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Elastic films of single-crystal two-dimensional covalent organic frameworks.
Yang, Yonghang; Liang, Baokun; Kreie, Jakob; Hambsch, Mike; Liang, Zihao; Wang, Cheng; Huang, Senhe; Dong, Xin; Gong, Li; Liang, Chaolun; Lou, Dongyang; Zhou, Zhipeng; Lu, Jiaxing; Yang, Yang; Zhuang, Xiaodong; Qi, Haoyuan; Kaiser, Ute; Mannsfeld, Stefan C B; Liu, Wei; Gölzhäuser, Armin; Zheng, Zhikun.
Affiliation
  • Yang Y; Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Lab
  • Liang B; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
  • Kreie J; Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany.
  • Hambsch M; Faculty of Physics, Bielefeld University, Bielefeld, Germany.
  • Liang Z; Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Lab
  • Wang C; Center for Advancing Electronics Dresden and Faculty of Electrical and Computer Engineering, Dresden University of Technology, Dresden, Germany.
  • Huang S; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China.
  • Dong X; The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China.
  • Gong L; Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Lab
  • Liang C; Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, China.
  • Lou D; Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, China.
  • Zhou Z; Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, Guangzhou, China.
  • Lu J; Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Lab
  • Yang Y; Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Lab
  • Zhuang X; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China.
  • Qi H; The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China.
  • Kaiser U; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
  • Mannsfeld SCB; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
  • Liu W; Faculty of Physics, Bielefeld University, Bielefeld, Germany.
  • Gölzhäuser A; Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, Guangzhou, China.
  • Zheng Z; Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany.
Nature ; 630(8018): 878-883, 2024 Jun.
Article in En | MEDLINE | ID: mdl-38718837
ABSTRACT
The properties of polycrystalline materials are often dominated by defects; two-dimensional (2D) crystals can even be divided and disrupted by a line defect1-3. However, 2D crystals are often required to be processed into films, which are inevitably polycrystalline and contain numerous grain boundaries, and therefore are brittle and fragile, hindering application in flexible electronics, optoelectronics and separation1-4. Moreover, similar to glass, wood and plastics, they suffer from trade-off effects between mechanical strength and toughness5,6. Here we report a method to produce highly strong, tough and elastic films of an emerging class of 2D crystals 2D covalent organic frameworks (COFs) composed of single-crystal domains connected by an interwoven grain boundary on water surface using an aliphatic bi-amine as a sacrificial go-between. Films of two 2D COFs have been demonstrated, which show Young's moduli and breaking strengths of 56.7 ± 7.4 GPa and 73.4 ± 11.6 GPa, and 82.2 ± 9.1 N m-1 and 29.5 ± 7.2 N m-1, respectively. We predict that the sacrificial go-between guided synthesis method and the interwoven grain boundary will inspire grain boundary engineering of various polycrystalline materials, endowing them with new properties, enhancing their current applications and paving the way for new applications.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nature Year: 2024 Type: Article
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nature Year: 2024 Type: Article