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Probing optical excitations in chevron-like armchair graphene nanoribbons

Abstract

The bottom-up fabrication of graphene nanoribbons (GNRs) has opened new opportunities to specifically tune their electronic and optical properties by precisely controlling their atomic structure. Here, we address excitations in GNRs with periodic structural wiggles, so-called chevron GNRs. Based on reflectance difference and high-resolution electron energy loss spectroscopies together with ab-initio simulations, we demonstrate that their excited-state properties are of excitonic nature. The spectral fingerprints corresponding to different reaction stages in their bottom-up fabrication are also unequivocally identified, allowing us to follow the exciton build-up from the starting monomer precursor to the final GNR structure.

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Publication details

The article was received on 18 Aug 2017, accepted on 10 Oct 2017 and first published on 11 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR06175G
Citation: Nanoscale, 2017, Accepted Manuscript
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    Probing optical excitations in chevron-like armchair graphene nanoribbons

    R. Denk, A. Lodi Rizzini, S. Wang, M. Hohage, P. Zeppenfeld, J. Cai, R. Fasel, P. Ruffieux, R. Berger, Z. Chen, A. Narita, X. Feng, K. Muellen, R. Biagi, V. de Renzi, D. Prezzi, A. Ruini and A. Ferretti, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR06175G

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