Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

Carbonell-Sanroma, Eduard and Brandimarte, Pedro and Balog, Richard and Corso, Martina and Kawai, Shigeki and Garcia-Lekue, Aran and Saito, Shohei and Yamaguchi, Shigehiro and Meyer, Ernst and Sanchez-Portal, Daniel and Ignacio Pascual, Jose. (2017) Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution. Nano Letters, 17 (1). pp. 50-56.

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Official URL: http://edoc.unibas.ch/58449/

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Bottom-up chemical reactions of selected molecular precursors on a gold surface can produce high quality graphene nanoribbons (GNRs). Here, we report on the formation of quantum dots embedded in an armchair GNR by substitutional inclusion of pairs of boron atoms into the GNR backbone. The boron inclusion is achieved through the addition of a small amount of boron substituted precursors during the formation of pristine GNRs. In the pristine region between two boron pairs, the nanoribbons show a discretization of their valence band into confined modes compatible with a Fabry-Perot resonator. Transport simulations of the scattering properties of the boron pairs reveal that they selectively confine the first valence band of the pristine ribbon while allowing an efficient electron transmission of the second one. Such band-dependent electron scattering stems from the symmetry matching between the electronic wave functions of the states from the pristine nanoribbons and those localized at the boron pairs.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:15 Jan 2018 15:18
Deposited On:15 Jan 2018 15:18

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