Doping of Graphene Nanoribbons <i>via</i> Functional Group Edge Modification

Carbonell-Sanromà, Eduard; Hieulle, Jérémy; Vilas‐Varela, Manuel; Brandimarte, Pedro; Iraola, Mikel; Barragán, Ana; Li, Jingcheng; Abadía, Mikel; Corso, Martina; Sánchez‐Portal, Daniel; Peña, Diego; Pascual, José

doi:10.1021/acsnano.7b03522

Cited by 84 publications

(104 citation statements)

References 41 publications

(101 reference statements)

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“…Graphene-based systems have recently been popular [107] although those doped by other non-metals have also been increasingly gaining attention. [108,109] These actually resemble the polyaromatic heterocyclic side products of organic species-releasing systems. Further, the low symmetry due to the central aromatic ring could give rise to varied surface structures due to surface chirality.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the final product in this reaction is an extended planar polyaromatic system important for molecular electronics. Graphene‐based systems have recently been popular although those doped by other non‐metals have also been increasingly gaining attention . These actually resemble the polyaromatic heterocyclic side products of organic species‐releasing systems.…”

Section: Discussionmentioning

confidence: 99%

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Photochromic Diarylethenes Designed for Surface Deposition: From Self‐Assembled Monolayers to Single Molecules

et al. 2019

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The efficient switching that can occur between two stable isomers of diarylethenes makes them particularly promising targets for opto‐ and molecular electronics. To examine these classes of molecules for electronics applications, they have been subjected to a series of scanning tunneling microscopy (STM) experiments, which are the focus of this Review. A brief introduction to the chemical design of diarylethenes in terms of their switching capabilities along with the basics of STM are presented. Next, initial STM studies on these compounds under ambient conditions are discussed. An overview of how molecular design affects the isomerization and self‐assembly of diarylethenes at the solid‐liquid interface as investigated by STM is then presented, as well as single‐molecule studies under ultrahigh vacuum. The last section presents further prospects for molecular design in the field.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Photochromic Diarylethenes Designed for Surface Deposition: From Self‐Assembled Monolayers to Single Molecules

et al. 2019

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“…To date, edge‐doping methodology and the preparation of N‐doped GNRs have been widely witnessed . Recently, Pascual's group designed the precursor by functionalizing the edge with nitrile groups . As a result, N‐doped GNRs ( Figure a) formed through the stepwise on‐surface synthesis stages.…”

Section: Doping Gnr With Heteroatomsmentioning

confidence: 99%

Modified Engineering of Graphene Nanoribbons Prepared via On‐Surface Synthesis

Zhou

2019

Advanced Materials

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1D graphene nanoribbons (GNRs) have a bright future in the fabrication of next‐generation nanodevices because of their nontrivial electronic properties and tunable bandgaps. To promote the application of GNRs, preparation strategies of miscellaneous GNRs have to be developed. The GNRs prepared by top‐down approaches are accompanied by uncontrolled edges and structures. In order to overcome the difficulties, bottom‐up methods are widely used in the growth of various GNRs due to controllability of GNRs' features. Among those bottom‐up methods, the on‐surface synthesis is a promising approach to prepare GNRs with distinct widths, edge/backbone structures, and so forth. Therefore, modified engineering of the GNRs prepared via on‐surface synthesis is of great significance in controllable preparation of GNRs and their potential applications. In the past decade, there have been a lot of reports on controllable preparation of GNRs using on‐surface synthesis approach. Herein, the advances of GNRs grown via on‐surface growth strategy are described. Several growth parameters, the latest advances in the modification of the GNR structure and width, the GNR doping/co‐doping with heteroatoms, a variety of GNR heterojunctions, and the device application of GNRs are reviewed. Finally, the opportunities and challenges are discussed.

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“…For instance, molecule 10 with an added phenyl substituent in molecule 1 is designed to fabricate yield (shown in Figure a) and, experimental STS spectra has demonstrated that its band gap is 1.0 eV (Figure b), which is smaller than pristine 7‐ AGNR . 7‐ AGNRs with −CN functional groups edge modification induce a downshift on the ribbon bands of ∼0.3 eV per −CN added (Figure c and Figure d) . Besides, edge‐fluorinated 7‐ AGNRs have been predicted to reveal electronic properties .…”

Section: Tuning the Electronic Propertiesmentioning

confidence: 99%

“…(b) The corresponding dI/dV spectra of 7‐ phenyl‐GNRs . (c) Constant height dI/dV image with a CO‐functionalized tip, Red arrows mark the positions of the CN groups . (d) Corresponding dI/dV spectra in colored crosses mark the position of (c).…”

Section: Tuning the Electronic Propertiesmentioning

confidence: 99%

Tuning the Electronic Properties of Atomically Precise Graphene Nanoribbons by Bottom‐Up Fabrication

et al. 2020

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Graphene, a monolayer of graphite, is predicted to be one of the most promising materials to replace silicon in future electronic instruments. Despite its extraordinary electronic and thermal properties, the lack of an electronic band gap severely hampers its potential for applications in digital electronics. In contrast, narrow stripes of graphene, so called graphene nanoribbons (GNRs) are semiconductors, due to the quantum confinement with the tunable band gap by variation with the width and edge structure that is armchair, zigzag or the combination of both edges. This review covers the recent progress in bottom‐up approaches based on the surface‐catalyzed assembly of molecular precursors and tuning of the electronic properties of GNRs by fabricating atomically precise GNRs of different widths, various edge structures as well as doped structures. In addition, this review also indicates the challenges ahead and possible promising ways to finely tune the electronic structures of GNRs through slight modifications of the molecular configurations of the precursors.

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Doping of Graphene Nanoribbons via Functional Group Edge Modification

Cited by 84 publications

References 41 publications

Photochromic Diarylethenes Designed for Surface Deposition: From Self‐Assembled Monolayers to Single Molecules

Photochromic Diarylethenes Designed for Surface Deposition: From Self‐Assembled Monolayers to Single Molecules

Modified Engineering of Graphene Nanoribbons Prepared via On‐Surface Synthesis

Tuning the Electronic Properties of Atomically Precise Graphene Nanoribbons by Bottom‐Up Fabrication

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