Step edge-mediated assembly of periodic arrays of long graphene nanoribbons on Au(111)

2019/09/09 by Chuanxu Ma, Zhongcan Xiao, Ma, Chuanxu +11
Materials Science · Engineering · #Graphene research and applications #Molecular Junctions and Nanostructures #Surface Chemistry and Catalysis

paper · pdf · doi:10.48550/arxiv.1909.03876

Abstract

The influence of substrate steps on the bottom-up synthesis of atomically precise graphene nanoribbons (GNRs) on an Au(111) surface is investigated. A straight surface step is found to promote the assembly of long and compact arrays of polymers with enhanced interchain pi-pi stacking interaction, which creates a steric hindrance effect on cyclodehydrogenation to suppress the H passivation of polymer ends. The modified two-stage growth process results in periodic arrays of GNRs with doubled average length near step edges.

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