Probing optical excitations in chevron-like armchair graphene nanoribbons
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...
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| Veröffentlicht in: | Nanoscale 2017-12, Vol.9 (46), p.18326-18333 |
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| creator | Denk, Richard Lodi-Rizzini, Alberto Wang, Shudong Hohage, Michael Zeppenfeld, Peter Cai, Jinming Fasel, Roman Ruffieux, Pascal Berger, Reinhard Franz Josef Chen, Zongping Narita, Akimitsu Feng, Xinliang Müllen, Klaus Biagi, Roberto De Renzi, Valentina Prezzi, Deborah Ruini, Alice Ferretti, Andrea |
| description | 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. |
| doi_str_mv | 10.1039/c7nr06175g |
| format | Article |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Atomic structure Electron energy Electron energy loss spectroscopy Excitation spectra Graphene Nanoribbons Optical properties Reflectance |
| title | Probing optical excitations in chevron-like armchair graphene nanoribbons |
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