초록 |
Owing to the fascinating properties of graphene, recently, a great deal of effort has been devoted to graphene research. Nevertheless, the simple synthesis and colloidal stabilization of graphene in aqueous solutions remains central to both academic research and practical applications. In this presentation, we address how the hydrophobic moieties of water-soluble polymers affect the physical exfoliation of graphite into graphenes in aqueous solution. Four different polymers with graphene-like moieties, such as phenyl- and pyrenyl-functionalized side chains, were synthesized on the basis of the two water-soluble polymers poly(vinyl alcohol) and dextran. Simple sonication of graphite with the polymers in an aqueous solution yielded stable graphene dispersions even after centrifugation. It is believed that our approach is advantageous for the large-scale production of high-quality, few-layer graphene in aqueous phase. |