Purely Armchair or Partially Chiral: Noncontact Atomic Force Microscopy Characterization of Dibromo-Bianthryl-Based Graphene Nanoribbons Grown on Cu(111)

Sánchez-Sánchez, Carlos; Dienel, Thomas; Deniz, Okan; Ruffieux, Pascal; Berger, Reinhard; Feng, Xinliang; Müllen, Klaus; Fasel, Roman (2016). Purely Armchair or Partially Chiral: Noncontact Atomic Force Microscopy Characterization of Dibromo-Bianthryl-Based Graphene Nanoribbons Grown on Cu(111). ACS nano, 10(8), pp. 8006-8011. American Chemical Society 10.1021/acsnano.6b04025

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We 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Fasel, Roman

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
500 Science > 530 Physics

ISSN:

1936-0851

Publisher:

American Chemical Society

Language:

English

Submitter:

Roman Fasel

Date Deposited:

05 Jan 2017 14:36

Last Modified:

06 Jan 2017 22:27

Publisher DOI:

10.1021/acsnano.6b04025

BORIS DOI:

10.7892/boris.90590

URI:

https://boris.unibe.ch/id/eprint/90590

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