Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

Eduard Carbonell-Sanroma; Pedro Brandimarte; Richard Balog; Martina Corso; Shigeki Kawai; Aran Garcia-Lekue; Shohei Saito; Shigehiro Yamaguchi; Ernst Meyer; Daniel Sanchez-Portal; Jose Ignacio Pascual

doi:10.1021/acs.nanolett.6b03148

Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

Eduard Carbonell-Sanroma, Pedro Brandimarte, Richard Balog, Martina Corso, Shigeki Kawai, Aran Garcia-Lekue, Shohei Saito, Shigehiro Yamaguchi, Ernst Meyer, Daniel Sanchez-Portal, Jose Ignacio Pascual^*

^*Corresponding author for this work

Department of Physics and Astronomy

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

58 Citations (Scopus)

Abstract

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 language	English
Journal	Nano Letters
Volume	17
Issue	1
Pages (from-to)	50-56
Number of pages	7
ISSN	1530-6984
DOIs	https://doi.org/10.1021/acs.nanolett.6b03148
Publication status	Published - Jan 2017

Keywords

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

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10.1021/acs.nanolett.6b03148

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title = "Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution",

abstract = "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.",

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

author = "Eduard Carbonell-Sanroma and Pedro Brandimarte and Richard Balog and Martina Corso and Shigeki Kawai and Aran Garcia-Lekue and Shohei Saito and Shigehiro Yamaguchi and Ernst Meyer and Daniel Sanchez-Portal and {Ignacio Pascual}, Jose",

year = "2017",

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doi = "10.1021/acs.nanolett.6b03148",

language = "English",

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T1 - Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

AU - Carbonell-Sanroma, Eduard

AU - Brandimarte, Pedro

AU - Balog, Richard

AU - Corso, Martina

AU - Kawai, Shigeki

AU - Garcia-Lekue, Aran

AU - Saito, Shohei

AU - Yamaguchi, Shigehiro

AU - Meyer, Ernst

AU - Sanchez-Portal, Daniel

AU - Ignacio Pascual, Jose

PY - 2017/1

Y1 - 2017/1

N2 - 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.

AB - 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.

KW - Scanning tunneling microscopy

KW - scanning tunneling spectroscopy

KW - graphene nanoribbon

KW - quantum dot

KW - on-surface synthesis

KW - electronic transport

KW - EDGE STATE

KW - HETEROJUNCTIONS

KW - ORDER

U2 - 10.1021/acs.nanolett.6b03148

DO - 10.1021/acs.nanolett.6b03148

M3 - Journal article

C2 - 28073274

SN - 1530-6984

VL - 17

SP - 50

EP - 56

JO - Nano Letters

JF - Nano Letters

IS - 1

ER -

Quantum Dots Embedded in Graphene Nanoribbons by Chemical Substitution

Abstract

Keywords

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