Turning PMMA nanofibers into graphene nanoribbons by in situ electron beam irradiation

Graphene nanoribbons are formed from ultrathin electrospun poly(methyl methacrylate) (PMMA) nanofibers by electron beam irradiation. The number and width of the graphene sheets can be controlled precisely (see figure), providing a novel method of obtaining designed graphenes. This graphitization technique could be combined with electron beam lithography in the future to obtain high-resolution patterned graphite circuits.