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A New On-Surface-Synthetic Pathway to 5-Armchair Graphene Nanoribbons on Cu(111) surfaces

Abstract

.We report a new pathway to fabricate armchair graphene nanoribbons with five carbon atoms in the cross section (5-AGNRs) on Cu (111) surfaces. Instead of using haloaromatics as precursors, the 5-AGNRs are synthesized via a surface assisted decarboxylation of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA). The on-surface decarboxylation of PTCDA can produce extended copper-perylene chains on Cu (111) that are able to transform into graphene nanoribbons after annealing at higher temperatures (ca.630K). Because of the low yield (ca. 20%) of GNRs upon copper extrusion, various gases are introduced to assist the transformation of the copper-perylene chains into the GNRs. Typical reducing gases (H2, CO) and oxidizing gas (O2) are evaluated for their performance in breaking aryl-Cu bonds. This method enriches on-surface protocols for the synthesis of AGNRs using non-halogen containing precursors.

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Publication details

The article was received on 11 Apr 2017, accepted on 10 May 2017 and first published on 22 May 2017


Article type: Paper
DOI: 10.1039/C7FD00129K
Citation: Faraday Discuss., 2017, Accepted Manuscript
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    A New On-Surface-Synthetic Pathway to 5-Armchair Graphene Nanoribbons on Cu(111) surfaces

    K. Sun, P. Ji, H. Zhang, K. Niu, L. Li, A. Chen, Q. Li, K. Muellen and L. Chi, Faraday Discuss., 2017, Accepted Manuscript , DOI: 10.1039/C7FD00129K

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