1. Propagative Exfoliation of High Quality Graphene
- Author
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Yue-Wen Liu, Su-Yuan Xie, Shu-Fen Chen, Yanmei Piao, Lan Feng, Xing-Yan Tang, Shun-Liu Deng, YuHuang Wang, and Lan-Sun Zheng
- Subjects
Photoluminescence ,Materials science ,Graphene ,General Chemical Engineering ,chemistry.chemical_element ,Nanotechnology ,General Chemistry ,Exfoliation joint ,law.invention ,chemistry ,law ,Materials Chemistry ,Graphite ,Solubility ,Carbon ,Graphene nanoribbons ,Graphene oxide paper - Abstract
High quality graphene materials that readily disperse in water or organic solvents are needed to achieve some of the most ambitious applications. However, current synthetic approaches are typically limited by irreversible structural damages, little solubility, or low scalability. Here, we describe a fundamental study of graphene chemistry and covalent functionalization patterns on sp2 carbon lattices, from which a facile, scalable synthesis of high quality graphene sheets was developed. Graphite materials were efficiently exfoliated by reductive, propagative alkylation. The exfoliated, propagatively alkylated graphene sheets (PAGenes) not only exhibited high solubility in common solvents such as chloroform, water, and N-methyl-pyrrolidone, but also showed electrical conductivity as high as 4.1 × 103 S/m, which is 5 orders of magnitude greater than those of graphene oxides. Bright blue photoluminescence, unattainable in graphene, was also observed. We attribute the rise of blue photoluminescence in PAGenes...
- Published
- 2013