title: On-surface synthesis of rylene-type graphene nanoribbons.
abstract: The narrowest armchair graphene nanoribbon (AGNR) with five carbons across the width of the GNR (5-AGNR) was synthesized on Au(111) surfaces via sequential dehalogenation processes in a mild condition by using 1,4,5,8-tetrabromonaphthalene as the molecular precursor. Gold-organic hybrids were observed by using high-resolution scanning tunneling microscopy and considered as intermediate states upon AGNR formation. Scanning tunneling spectroscopy reveals an unexpectedly large band gap of Δ = 2.8 ± 0.1 eV on Au(111) surface which can be interpreted by the hybridization of the surface states and the molecular states of the 5-AGNR.
authors.affiliation: ‡Physikalisches Institut and Center for Nanoscience and Technology (CeNTech), Universität Münster, 48149 Münster, Germany.
authors.forename: Haiming
authors.initials: H
authors.lastname: Zhang
authors.forename: Haiping
authors.initials: H
authors.lastname: Lin
authors.forename: Kewei
authors.initials: K
authors.lastname: Sun
authors.affiliation: §Max Planck Institute for Polymer Research, 55128 Mainz, Germany.|∥Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China.
authors.forename: Long
authors.initials: L
authors.lastname: Chen
authors.affiliation: §Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
authors.forename: Yulian
authors.initials: Y
authors.lastname: Zagranyarski
authors.forename: Nabi
authors.initials: N
authors.lastname: Aghdassi
authors.forename: Steffen
authors.initials: S
authors.lastname: Duhm
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
authors.affiliation: ‡Physikalisches Institut and Center for Nanoscience and Technology (CeNTech), Universität Münster, 48149 Münster, Germany.
authors.forename: Dingyong
authors.initials: D
authors.lastname: Zhong
authors.forename: Youyong
authors.initials: Y
authors.lastname: Li
authors.affiliation: §Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.affiliation: ‡Physikalisches Institut and Center for Nanoscience and Technology (CeNTech), Universität Münster, 48149 Münster, Germany.
authors.forename: Harald
authors.initials: H
authors.lastname: Fuchs
authors.forename: Lifeng
authors.initials: L
authors.lastname: Chi