▎ 摘　　要

NOVELTY - N=15 precursor comprises one of either triphenyltriphenylene (TTTP) or a variant of TTTP. USE - N=15 precursor for electronic device (claimed) and armchair graphene nanoribbons. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a N=11 precursor, which comprises one of either di-biphenyl dibromoperylene (dpbDBP) or variants of dpbDBP; (2) an electronic device, which has channel between two terminals, where the channel comprises a graphene nanoribbon having a width of one of either N=11 or N=15; (3) a method of forming a graphene nanoribbon, which involves depositing a gold film on a substrate; depositing a graphene nanoribbon precursor onto the gold film; polymerizing the precursor to produce polymers; and (4) annealing the polymers to cause cyclodehydrogenation of the polymers and form armchair graphene nanoribbons and etching the gold film to remove the gold film and such that the graphene nanoribbons reside directly on the substrate.