Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution
2016; American Chemical Society; Volume: 17; Issue: 1 Linguagem: Inglês
10.1021/acs.nanolett.6b03148
ISSN1530-6992
AutoresEduard Carbonell-Sanromà, Pedro Brandimarte, Richard Balog, Martina Corso, Shigeki Kawai, Aran García-Lekue, Shohei Saito, Shigehiro Yamaguchi, Ernst Meyer, Daniel Sánchez‐Portal, José Ignacio Pascual,
Tópico(s)Advancements in Battery Materials
ResumoBottom-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.
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