| 초록 |
Since the first experimental observation in 2004, graphene has been attracted a lot of attention due to its outstanding properties such as high transparency, high electron and hole mobility, and so on. In particular, graphene shows ballistic charge transport, making it to be an ideal material for electronic devices. Despite of the characteristics of high mobility, graphene has limitations for using in electronics due to a vanishing band-gap. There are several attempts to open band-gap of graphene including graphene nanoribbon, bilayer graphene and functionalization of graphene. All these approaches do not resolve fundamental problems. Here, we reported edge-selective functionalization of graphite with maleic anhydride via Diels-Alder reaction to open band-gap. The process involves a very simple mechanochemical reaction in ball-milling apparatus in solid state. Edge-functionalized graphene can be efficiently afforded by dispersing in polar solvents. |
