https://scholars.lib.ntu.edu.tw/handle/123456789/598166
標題: | Programmed exfoliation of hierarchical graphene nanosheets mediated by dynamic self-assembly of supramolecular polymers | 作者: | Melaku A.Z Chuang W.-T Shieh Y.-T Chiu C.-W Lee D.-J Lai J.-Y Cheng C.-C. DUU-JONG LEE |
關鍵字: | Exfoliation (materials science);Graphite;Halogenation;Hydrogen bonds;Nanosheets;Self assembly;Supramolecular chemistry;Dynamic self-assembly;Exfoliated graphite;Functionalized;Graphene nanosheets;Halogenated solvents;High quality;Layer thickness;Ortho-dichlorobenzene;Supramolecular polymers;Tunables;Graphene | 公開日期: | 2021 | 卷: | 5 | 期: | 18 | 起(迄)頁: | 6998-7011 | 來源出版物: | Materials Chemistry Frontiers | 摘要: | Programmed formation of hierarchical graphene nanosheets, based on a combination of first and second exfoliations using the halogenated solvent ortho-dichlorobenzene (ODCB) and an adenine-functionalized supramolecular polymer (A-PPG), respectively, can be used to directly exfoliate graphite into high-quality graphene nanosheets with wide-range tunable layer thickness. In this study, we discover that natural graphite in ODCB can be directly exfoliated into well-dispersed, dozen-layer exfoliated graphite (EG) nanosheets with relatively weak interlayer interactions; this process is called first exfoliation. On subsequent addition of A-PPG into the EG solution (i.e., second exfoliation), the hydrogen-bonded adenine moieties act as indispensable key units that manipulate the self-assembly behavior of the A-PPG polymers to effectively form long-range ordered lamellar nanostructures on the surface of the graphene nanosheets. This process substantially enhances the long-term dispersion stability of EG in ODCB and achieves the production of exfoliated graphene nanosheets with the desired structural characteristics through simply adjusting the content of A-PPG in the composites. These desirable characteristics of non-covalently functionalized graphene with a supramolecular polymer are extremely rare, but highly attractive for the development of physically custom-tailored graphene based on combined first and second exfoliation processes. Thus, this development provides a facile, highly efficient graphene fabrication process for potential applications in various fields. This journal is ? the Partner Organisations. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115348445&doi=10.1039%2fd1qm00810b&partnerID=40&md5=bd60eac9b84f5ece5e6ddd8771906897 https://scholars.lib.ntu.edu.tw/handle/123456789/598166 |
ISSN: | 20521537 | DOI: | 10.1039/d1qm00810b |
顯示於: | 化學工程學系 |
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