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Issue 46, 2017
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Probing optical excitations in chevron-like armchair graphene nanoribbons

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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 excitation in GNRs with periodic structural wiggles, the 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.

Graphical abstract: Probing optical excitations in chevron-like armchair graphene nanoribbons

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Article information


Submitted
18 Aug 2017
Accepted
10 Oct 2017
First published
11 Oct 2017

Nanoscale, 2017,9, 18326-18333
Article type
Paper

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. F. J. Berger, Z. Chen, A. Narita, X. Feng, K. Müllen, R. Biagi, V. De Renzi, D. Prezzi, A. Ruini and A. Ferretti, Nanoscale, 2017, 9, 18326
DOI: 10.1039/C7NR06175G

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