J. Am. Chem. Soc.: On-surface synthesis of rylene-type graphene nanoribbon

Date:2015-10-18Keywords:Graphene nanoribbonView:1629


On-surface synthesis of rylene-type graphene nanoribbon


  • Haiming Zhang, 
  • Haiping Lin, 
  • Kewei Sun, 
  • Long Chen, 
  • Yulian Zagranyarski, 
  • Nabi Aghdassi, 
  • Steffen Duhm, 
  • Qing Li, 
  • Dingyong Zhong, 
  • Youyong Li, 
  • Klaus Müllen*, 
  • Harald Fuchs*, 
  • Lifeng Chi*


1Jiangsu Key Laboratory for Carbon Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, P. R. China

2Physikalisches Institut and Center for Nanoscience and Technology (CeNTech), Universitat Mu ̈ ̈nster, 48149 Münster, Germany 3Max Planck Institute for Polymer Research, 55128 Mainz, Germany 4Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China 5School of Physics and Engineering & State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, 510275 Guangzhou, P. R. China


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.