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Purely armchair or partially chiral: noncontact atomic force microscopy characterization of dibromo-bianthryl-based graphene nanoribbons grown on Cu(111)

AuthorsSánchez-Sánchez, Carlos ; Dienel, Thomas; Deniz, Okan; Ruffieux, Pascal; Berger, Reinhard; Feng, Xinliang; Müllen, Klaus; Fasel, Roman
KeywordsFunctionalized tip
On-surface synthesis
Graphene nanoribbons
Issue Date23-Aug-2016
PublisherAmerican Chemical Society
CitationACS Nano 10(8): 8006-8011 (2016)
AbstractWe report on the atomic structure of graphene nanoribbons (GNRs) formed via on-surface synthesis from 10,10′-dibromo-9,9′-bianthryl (DBBA) precursors on Cu(111). By means of ultrahigh vacuum noncontact atomic force microscopy with CO-functionalized tips we unveil the chiral nature of the so-formed GNRs, a structure that has been under considerable debate. Furthermore, we prove that - in this particular case - the coupling selectivity usually introduced by halogen substitution is overruled by the structural and catalytic properties of the substrate. Specifically, we show that identical chiral GNRs are obtained from 9,9′-bianthryl, the unsubstituted sister molecule of DBBA.
Publisher version (URL)https://doi.org/10.1021/acsnano.6b04025
Identifiersdoi: 10.1021/acsnano.6b04025
e-issn: 1936-086X
issn: 1936-0851
Appears in Collections:(ICMM) Artículos
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