Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

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  • Eduard Carbonell-Sanroma, CIC NanoGUNE
  • ,
  • Pedro Brandimarte, Donostia Int Phys Ctr
  • ,
  • Richard Balog
  • Martina Corso, Basque Fdn Sci, Ikerbasque
  • ,
  • Shigeki Kawai, Japan Sci & Technol Agcy, Japan Science & Technology Agency (JST), PRESTO
  • ,
  • Aran Garcia-Lekue, Basque Fdn Sci, Ikerbasque
  • ,
  • Shohei Saito, Kyoto Univ, Kyoto University, Grad Sch Sci, Dept Chem, Sakyo Ku
  • ,
  • Shigehiro Yamaguchi, Nagoya Univ, Nagoya University, Inst Transformat Biomol, Chikusa Ku
  • ,
  • Ernst Meyer, Univ Basel, University of Basel, Dept Phys
  • ,
  • Daniel Sanchez-Portal, Donostia Int Phys Ctr
  • ,
  • Jose Ignacio Pascual, Basque Fdn Sci, Ikerbasque

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.

Original languageEnglish
JournalNano Letters
Pages (from-to)50-56
Number of pages7
Publication statusPublished - Jan 2017

    Research areas

  • Scanning tunneling microscopy, scanning tunneling spectroscopy, graphene nanoribbon, quantum dot, on-surface synthesis, electronic transport, EDGE STATE, HETEROJUNCTIONS, ORDER

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