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  On-surface synthesis and characterization of teranthene and hexanthene: ultrashort graphene nanoribbons with mixed armchair and zigzag edges

Borin Barin, G., Di Giovannantonio, M., Lohr, T. G., Mishra, S., Kinikar, A., Perrin, M. L., et al. (2023). On-surface synthesis and characterization of teranthene and hexanthene: ultrashort graphene nanoribbons with mixed armchair and zigzag edges. Nanoscale, 15(41), 16766-16774. doi:10.1039/d3nr03736c.

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https://doi.org/10.1039/D3NR03736C (Verlagsversion)
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 Urheber:
Borin Barin, Gabriela1, Autor
Di Giovannantonio, Marco1, Autor
Lohr, Thorsten G.1, Autor
Mishra, Shantanu1, Autor
Kinikar, Amogh1, Autor
Perrin, Mickael L.1, Autor
Overbeck, Jan1, Autor
Calame, Michel1, Autor
Feng, Xinliang2, Autor                 
Fasel, Roman1, Autor
Ruffieux, Pascal1, Autor
Affiliations:
1external, ou_persistent22              
2Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3316580              

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 Zusammenfassung: Graphene nanoribbons (GNRs) exhibit a broad range of physicochemical properties that critically depend on their width and edge topology. GNRs with armchair edges (AGNRs) are usually more stable than their counterparts with zigzag edges (ZGNRs) where the low-energy spin-polarized edge states render the ribbons prone to being altered by undesired chemical reactions. On the other hand, such edge-localized states make ZGNRs highly appealing for applications in spintronic and quantum technologies. For GNRs fabricated via on-surface synthesis under ultrahigh vacuum conditions on metal substrates, the expected reactivity of zigzag edges is a serious concern in view of substrate transfer and device integration under ambient conditions, but corresponding investigations are scarce. Using 10-bromo-9,9′:10′,9′′-teranthracene as a precursor, we have thus synthesized hexanthene (HA) and teranthene (TA) as model compounds for ultrashort GNRs with mixed armchair and zigzag edges, characterized their chemical and electronic structure by means of scanning probe methods, and studied their chemical reactivity upon air exposure by Raman spectroscopy. We present a detailed identification of molecular orbitals and vibrational modes, assign their origin to armchair or zigzag edges, and discuss the chemical reactivity of these edges based on characteristic Raman spectral features.

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 Datum: 2023-09-262023-11-07
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 001119374100001
DOI: 10.1039/d3nr03736c
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Titel: Nanoscale
  Kurztitel : Nanoscale
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Cambridge, UK : Royal Society of Chemistry
Seiten: - Band / Heft: 15 (41) Artikelnummer: - Start- / Endseite: 16766 - 16774 Identifikator: ISSN: 2040-3364
CoNE: https://pure.mpg.de/cone/journals/resource/2040-3364