Wide graphene nanoribbons produced by interchain fusion of poly(p-phenylene) via two-zone chemical vapor deposition.

Wide graphene nanoribbons (GNRs) were fabricated via two-zone chemical vapor deposition using 4,4''-dibromo-p-terphenyl as the precursor. Densely packed arrays of poly(p-phenylene) produced on Au(111) using this method could be converted into wide GNRs via interchain fusion by thermal annealing. The field-effect transistor prepared from these GNRs exhibited an excellent on/off current ratio of 1.6 ± 0.6 × 103.