title: Heterostructures through Divergent Edge Reconstruction in Nitrogen-Doped Segmented Graphene Nanoribbons.
abstract: Atomically precise engineering of defined segments within individual graphene nanoribbons (GNRs) represents a key enabling technology for the development of advanced functional device architectures. Here, the bottom-up synthesis of chevron GNRs decorated with reactive functional groups derived from 9-methyl-9H-carbazole is reported. Scanning tunneling and non-contact atomic force microscopy reveal that a thermal activation of GNRs induces the rearrangement of the electron-rich carbazole into an electron-deficient phenanthridine. The selective chemical edge-reconstruction of carbazole-substituted chevron GNRs represents a practical strategy for the controlled fabrication of spatially defined GNR heterostructures from a single molecular precursor.
authors.affiliation: Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA, 94720, U.S.A.
authors.forename: Tomas
authors.initials: T
authors.lastname: Marangoni
authors.affiliation: Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA, 94720, U.S.A.
authors.forename: Danny
authors.initials: D
authors.lastname: Haberer
authors.affiliation: Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA, 94720, United States.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Rizzo
authors.affiliation: Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA, 94720, U.S.A.
authors.forename: Ryan R
authors.initials: RR
authors.lastname: Cloke
authors.affiliation: Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA, 94720, U.S.A.. ffischer@berkeley.edu.|Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, United States. ffischer@berkeley.edu.|Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, United States. ffischer@berkeley.edu.
authors.forename: Felix R
authors.initials: FR
authors.lastname: Fischer
keywords: STM; graphene; nanostructures; nc-AFM; surface chemistry