| 초록 |
Graphene has potential for electrical applications. Hitherto, the most conventional methods to synthesize graphene are from chemical vapor deposition (CVD) and graphite oxide (GO). In case of the CVD, relatively high quality graphene could be synthesized. However, the tedious process and using expensive substrates inhibit large-scale production. In the case of GO, GO readily exfoliates into individual layer in water, but this method introduces a amount of oxidized defects on basal plane. However, full restoration of graphene structure is technically impossible to restore graphene structure. Here, we report a “direct” Friedel-Crafts acylation reaction between graphite and 4-ethylbenzoic acid (EBA) to afford edge-functionalized graphite (EFG). The EFG is readily dispersible in various common organic solvents up to concentrations as high as 0.8 mg/mL. We could obtain the high-quality and large-area graphene film via solution processing. Its electronic properties will be discussed. |
