Unlike graphene itself, or carbon nanotubes, very narrow nanoribbons of graphene are completely semiconducting. Dai and colleagues reliably produce bulk quantities of sub-10 nm graphene nanoribbons by partial encapsulation of carbon nanotubes in a polymer. The exposed part of the nanotube can be cut by plasma etching, so that the nanotube unzips when the polymer is removed, leaving a very thin strip of graphene.
- Liying Jiao
- Li Zhang
- Hongjie Dai